# Mid Sussex (UK Parliament constituency)

Mid Sussex is a constituency represented in the House of Commons of the UK Parliament from 2024 by Alison Bennett, a Liberal Democrat.

## Constituency profile

The constituency is centred around the towns of Haywards Heath and Burgess Hill and takes in the southern half of the local government district of the same name. Located on the West Sussex side of the border with East Sussex, the constituency is well served by transport links, with rail connections to Brighton, Gatwick Airport, London and the Sussex coast, and the M23/A23 running through the west of the constituency. The south of the constituency lies within the South Downs National Park.
Income levels are on average considerably higher than the national average and levels of rented and social housing are below the national average, particularly levels seen in cities.

## Boundaries
### Historic

1974–1983: The Urban Districts of Burgess Hill and Cuckfield, and the Rural District of Cuckfield.
1983–1997: The District of Mid Sussex wards of Ardingly, Bolney, Burgess Hill Chanctonbury, Burgess Hill Franklands, Burgess Hill North, Burgess Hill St Andrews, Burgess Hill Town, Burgess Hill West, Clayton, Cuckfield, East Grinstead East, East Grinstead North, East Grinstead South, East Grinstead West, Haywards Heath Ashenground, Haywards Heath Bentswood, Haywards Heath Franklands, Haywards Heath Harlands, Haywards Heath Heath, Horsted Keynes, Hurstpierpoint, Keymer, Lindfield Rural, Lindfield Urban, and West Hoathly.
1997–2010: The District of Mid Sussex wards of Ardingly, Burgess Hill Chanctonbury, Burgess Hill Franklands, Burgess Hill North, Burgess Hill St Andrews, Burgess Hill Town, Burgess Hill West, Cuckfield, East Grinstead East, East Grinstead North, East Grinstead South, East Grinstead West, Haywards Heath Ashenground, Haywards Heath Bentswood, Haywards Heath Franklands, Haywards Heath Harlands, Haywards Heath Heath, Horsted Keynes, Lindfield Rural, Lindfield Urban, and West Hoathly.
2010–2024: The District of Mid Sussex wards of Ashurst Wood, Bolney, Burgess Hill Dunstall, Burgess Hill Franklands, Burgess Hill Leylands, Burgess Hill Meeds, Burgess Hill St Andrews, Burgess Hill Victoria, Cuckfield, East Grinstead Ashplats, East Grinstead Baldwins, East Grinstead Herontye, East Grinstead Imberhorne, East Grinstead Town, Haywards Heath Ashenground, Haywards Heath Bentswood, Haywards Heath Franklands, Haywards Heath Heath, Haywards Heath Lucastes, High Weald, and Lindfield.

### Current

Further to the 2023 Periodic Review of Westminster constituencies which became effective for the 2024 general election, the constituency was defined as being composed of the following as they existed on 1 December 2020:
* The District of Mid Sussex wards of: Bolney; Burgess Hill Dunstall; Burgess Hill Franklands; Burgess Hill Leylands; Burgess Hill Meeds; Burgess Hill St. Andrews; Burgess Hill Victoria; Cuckfield; Hassocks; Haywards Heath Ashenground; Haywards Heath Bentswood; Haywards Heath Franklands; Haywards Heath Heath; Haywards Heath Lucastes; Hurstpierpoint and Downs; Lindfield.
Following a local government boundary review which came into effect in May 2023, the constituency now comprises the following from the 2024 general election:
* The District of Mid Sussex wards of Ardingly, Balcombe & Turners Hill (small part); Burgess Hill Dunstall; Burgess Hill Franklands; Burgess Hill Leylands; Burgess Hill Meeds & Hammonds; Burgess Hill St Andrews; Burgess Hill Victoria; Cuckfield, Bolney & Ansty; Downland Villages; Hassocks; Haywards Heath Ashenground; Haywards Heath Bentswood & Heath; Haywards Heath Franklands; Haywards Heath Lucastes & Bolnore; Haywards Heath North; Hurstpierpoint; Lindfield; Lindfield Rural & High Weald (small part).
The electorate was reduced to bring it within the permitted range by transferring northern parts, including the town of East Grinstead to the newly created constituency of East Grinstead and Uckfield. This was partly offset by adding the villages of Hassocks and Hurstpierpoint from Arundel and South Downs.

## History

The constituency was created in 1974 from parts of the seats of Lewes and East Grinstead, and has undergone significant boundary changes at every periodical review that it has been around for. Prior to 1973, the local government district had actually been a part of East Sussex, but as a result of delayed implementation of the Local Government Act 1972, it was almost wholly moved into West Sussex.
At the 1983 general election, it gained some of the wards (including East Grinstead itself) previously contained in the East Grinstead constituency (which disappeared at that election, its last MP Geoffrey Johnson Smith contested and won the new seat of Wealden in East Sussex), and at the 1997 election, it gained many of the semi-rural wards with smaller communities between East Grinstead and Crawley. For the 2024 election, the seat lost East Grinstead again – to the new seat of East Grinstead and Uckfield.
From its creation in 1974 until 2024, it was a Conservative seat. Its first MP was Tim Renton, who held the seat until 1997. He was succeeded by Nicholas Soames (a grandson of former Prime Minister Winston Churchill), who had been MP for the neighbouring seat of Crawley from 1983 to 1997.
In the 2016 European Union referendum, Mid Sussex voted for the United Kingdom to remain a member of the European Union. Despite this, Soames called for MPs to back Theresa May's withdrawal agreement. However, he was one of the 21 Conservative rebels who voted to allow Parliament to vote to legislate to prevent a no deal Brexit on 3 September 2019, and subsequently became an independent, after the rebels had the Conservative whip removed. He then decided not to stand for re-election although he had the whip restored before dissolution.
Soames was succeeded by Mims Davies, who had been MP for Eastleigh in Hampshire from 2015 to 2019. Following boundary changes for the 2024 general election, Davies stood down and decided to stand (successfully) for the notionally safer new seat of East Grinstead and Uckfield.
The primary opposition to the Conservatives until the 2015 election had been the Liberal Democrats and their predecessors the Liberal Party. In 2015, there was a severe fall in Liberal Democrats' support. Labour's candidate came second in the seat for the first time in its history. In 2017, Labour consolidated this lead at the 2017 general election by gaining almost double the votes of the Liberal Democrats. The Liberal Democrats regained a clear second place in the 2019 general election, and won the seat in 2024 following boundary changes, with Alison Bennett being elected as the new MP.

## Members of Parliament

East Grinstead and Lewes prior to 1974
| Election | Member | Party |
| Feb 1974 | Tim Renton | Conservative |
| 1997 | Sir Nicholas Soames | Conservative |
| 2019 | Sir Nicholas Soames | Independent |
| 2019 | Sir Nicholas Soames | Conservative |
| 2019 | Mims Davies | Conservative |
| 2024 | Alison Bennett | Liberal Democrats |

## Elections
### Elections in the 2020s

General election 2024: Mid Sussex :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal Democrats | Alison Bennett | 21,136 | 39.6 | +14.1 |
| | Conservative | Kristy Adams | 14,474 | 27.1 | −24.2 |
| | Labour | Dave Rowntree | 9,397 | 17.6 | −0.4 |
| | Reform UK | Gary Johnson | 5,921 | 11.1 | N/A |
| | Green | Deanna Nicholson | 2,048 | 3.8 | −0.3 |
| | Monster Raving Loony | Baron Von Thunderclap | 352 | 0.7 | −0.3 |
| Majority | Majority | Majority | 6,662 | 12.5 | N/A |
| Turnout | Turnout | Turnout | 53,328 | 70.2 | −3.1 |
| Registered electors | Registered electors | Registered electors | 75,969 | | |
| | Liberal Democrats gain from Conservative | Liberal Democrats gain from Conservative | Swing | +19.2 | |

### Elections in the 2010s

2019 notional result :
| Party | Party | Vote | % |
| | Conservative | 27,154 | 51.3 |
| | Liberal Democrats | 13,489 | 25.5 |
| | Labour | 9,530 | 18.0 |
| | Green | 2,179 | 4.1 |
| | Others | 597 | 1.1 |
| Turnout | Turnout | 52,949 | 73.3 |
| Electorate | Electorate | 72,255 |
General election 2019: Mid Sussex :
| Party | Party | Candidate | Votes | % | ±% |
| | Conservative | Mims Davies | 33,455 | 53.3 | −3.6 |
| | Liberal Democrats | Robert Eggleston | 15,258 | 24.3 | +11.6 |
| | Labour | Gemma Bolton | 11,218 | 17.9 | −7.1 |
| | Green | Deanna Nicholson | 2,234 | 3.6 | +1.1 |
| | Monster Raving Loony | Baron Von Thunderclap | 550 | 0.9 | +0.1 |
| | Advance | Brett Mortensen | 47 | 0.1 | N/A |
| Majority | Majority | Majority | 18,197 | 29.0 | −2.9 |
| Turnout | Turnout | Turnout | 62,762 | 73.7 | +0.9 |
| | Conservative hold | Conservative hold | Swing | −7.6 | |
* Davies had served as Member of Parliament for Eastleigh from 2015 until the 2019 election was called.
General election 2017: Mid Sussex :
| Party | Party | Candidate | Votes | % | ±% |
| | Conservative | Nicholas Soames | 35,082 | 56.9 | +0.8 |
| | Labour | Greg Mountain | 15,409 | 25.0 | +11.1 |
| | Liberal Democrats | Sarah Osborne | 7,855 | 12.7 | +1.2 |
| | Green | Chris Jerrey | 1,571 | 2.5 | −1.8 |
| | UKIP | Toby Brothers | 1,251 | 2.0 | −10.0 |
| | Monster Raving Loony | Baron Von Thunderclap | 464 | 0.8 | +0.2 |
| Majority | Majority | Majority | 19,673 | 31.9 | −10.3 |
| Turnout | Turnout | Turnout | 61,632 | 72.8 | +0.5 |
| | Conservative hold | Conservative hold | Swing | −5.15 | |
General election 2015: Mid Sussex :
| Party | Party | Candidate | Votes | % | ±% |
| | Conservative | Nicholas Soames | 32,268 | 56.1 | +5.4 |
| | Labour | Greg Mountain | 7,982 | 13.9 | +7.3 |
| | UKIP | Toby Brothers | 6,898 | 12.0 | +9.5 |
| | Liberal Democrats | Daisy Cooper | 6,604 | 11.5 | −26.0 |
| | Green | Miranda Diboll | 2,453 | 4.3 | +3.1 |
| | Independent | Beki Adam | 958 | 1.7 | N/A |
| | Monster Raving Loony | Baron Von Thunderclap | 329 | 0.6 | +0.1 |
| Majority | Majority | Majority | 24,286 | 42.2 | +29.0 |
| Turnout | Turnout | Turnout | 57,492 | 72.3 | −0.1 |
| | Conservative hold | Conservative hold | Swing | −0.95 | |
General election 2010: Mid Sussex :
| Party | Party | Candidate | Votes | % | ±% |
| | Conservative | Nicholas Soames | 28,329 | 50.7 | +2.5 |
| | Liberal Democrats | Serena Tierney | 20,927 | 37.5 | +1.8 |
| | Labour | David Boot | 3,689 | 6.6 | –6.2 |
| | UKIP | Marc Montgomery | 1,423 | 2.5 | –0.7 |
| | Green | Paul Brown | 645 | 1.2 | N/A |
| | BNP | Stuart Minihane | 583 | 1.0 | N/A |
| | Monster Raving Loony | Baron von Thunderclap | 259 | 0.5 | N/A |
| Majority | Majority | Majority | 7,402 | 13.2 | +0.7 |
| Turnout | Turnout | Turnout | 55,855 | 72.4 | +0.35 |
| | Conservative hold | Conservative hold | Swing | +1.3 | |

### Elections in the 2000s

General election 2005: Mid Sussex :
| Party | Party | Candidate | Votes | % | ±% |
| | Conservative | Nicholas Soames | 23,765 | 48.0 | +1.8 |
| | Liberal Democrats | Serena Tierney | 17,875 | 36.1 | +5.0 |
| | Labour | Robert Fromant | 6,280 | 12.7 | −6.3 |
| | UKIP | Harold Piggott | 1,574 | 3.2 | +0.7 |
| Majority | Majority | Majority | 5,890 | 11.9 | −3.2 |
| Turnout | Turnout | Turnout | 49,494 | 68.6 | +3.7 |
| | Conservative hold | Conservative hold | Swing | −1.6 | |
General election 2001: Mid Sussex :
| Party | Party | Candidate | Votes | % | ±% |
| | Conservative | Nicholas Soames | 21,150 | 46.2 | +2.7 |
| | Liberal Democrats | Lesley Wilkins | 14,252 | 31.1 | +0.5 |
| | Labour | Paul Mitchell | 8,693 | 19.0 | +0.4 |
| | UKIP | Petrina Holdsworth | 1,126 | 2.5 | +1.4 |
| | Monster Raving Loony | Baron Von Thunderclap Berry | 601 | 1.3 | N/A |
| Majority | Majority | Majority | 6,898 | 15.1 | +2.2 |
| Turnout | Turnout | Turnout | 45,822 | 64.9 | −12.7 |
| | Conservative hold | Conservative hold | Swing | | |

### Elections in the 1990s

General election 1997: Mid Sussex :
| Party | Party | Candidate | Votes | % | ±% |
| | Conservative | Nicholas Soames | 23,231 | 43.5 | −15.5 |
| | Liberal Democrats | Margaret Collins | 16,377 | 30.6 | +2.4 |
| | Labour | Mervyn Hamilton | 9,969 | 18.6 | +8.0 |
| | Referendum | Tam Large | 3,146 | 5.9 | N/A |
| | UKIP | J.V. Barnett | 606 | 1.1 | N/A |
| | Justice and Renewal Independent Party | Ernest Tudway | 134 | 0.3 | N/A |
| Majority | Majority | Majority | 6,854 | 12.9 | −17.9 |
| Turnout | Turnout | Turnout | 53,463 | 77.6 | |
| | Conservative hold | Conservative hold | Swing | | |
This constituency underwent boundary changes between the 1992 and 1997 general elections and thus change in share of vote is based on a notional calculation.
General election 1992: Mid Sussex :
| Party | Party | Candidate | Votes | % | ±% |
| | Conservative | Tim Renton | 39,524 | 59.0 | −2.1 |
| | Liberal Democrats | Margaret Collins | 18,996 | 28.4 | −3.1 |
| | Labour | L C Gregory | 6,951 | 10.4 | +3.0 |
| | Green | H G Stevens | 772 | 1.1 | N/A |
| | Monster Raving Loony | P B Berry | 392 | 0.6 | N/A |
| | Independent | P D Hodkin | 246 | 0.4 | N/A |
| | Natural Law | A M A Hankey | 89 | 0.1 | N/A |
| Majority | Majority | Majority | 20,528 | 30.6 | +1.0 |
| Turnout | Turnout | Turnout | 66,970 | 82.9 | +5.7 |
| | Conservative hold | Conservative hold | Swing | | |

### Elections in the 1980s

General election 1987: Mid Sussex :
| Party | Party | Candidate | Votes | % | ±% |
| | Conservative | Tim Renton | 37,781 | 61.1 | −0.3 |
| | Liberal | Nicholas Westbrook | 19,489 | 31.5 | −0.8 |
| | Labour | Robert Hughes | 4,573 | 7.4 | +1.4 |
| Majority | Majority | Majority | 18,292 | 29.6 | +0.5 |
| Turnout | Turnout | Turnout | 61,843 | 77.2 | +2.5 |
| | Conservative hold | Conservative hold | Swing | | |
General election 1983: Mid Sussex :
| Party | Party | Candidate | Votes | % |
| | Conservative | Tim Renton | 35,310 | 61.4 |
| | Liberal | Jack Campbell | 18,566 | 32.3 |
| | Labour | Patricia Hawkes | 3,470 | 6.0 |
| | Independent | J Bray | 196 | 0.3 |
| Majority | Majority | Majority | 16,744 | 29.1 |
| Turnout | Turnout | Turnout | 57,542 | 74.7 |
| | Conservative hold | Conservative hold | Swing | |
This constituency underwent boundary changes between the 1979 and 1983 general elections and thus calculation of the change in share of vote is not possible.

### Elections in the 1970s

General election 1979: Mid Sussex :
| Party | Party | Candidate | Votes | % | ±% |
| | Conservative | Tim Renton | 32,548 | 61.2 | +7.3 |
| | Liberal | Jack Campbell | 11,705 | 22.0 | −6.1 |
| | Labour | Des Turner | 8,260 | 15.5 | −2.5 |
| | Ind. Conservative | S M H Haslett | 697 | 1.3 | N/A |
| Majority | Majority | Majority | 20,843 | 39.2 | +13.4 |
| Turnout | Turnout | Turnout | 53,210 | 78.0 | +1.6 |
| | Conservative hold | Conservative hold | Swing | | |
General election October 1974: Mid Sussex :
| Party | Party | Candidate | Votes | % | ±% |
| | Conservative | Tim Renton | 25,126 | 53.9 | −0.2 |
| | Liberal | Bob Symes | 13,129 | 28.1 | −1.9 |
| | Labour | M R Fraser | 8,404 | 18.0 | +2.2 |
| Majority | Majority | Majority | 11,997 | 25.8 | +1.7 |
| Turnout | Turnout | Turnout | 46,659 | 76.4 | −6.9 |
| | Conservative hold | Conservative hold | Swing | | |
General election February 1974: Mid Sussex :
| Party | Party | Candidate | Votes | % | ±% |
| | Conservative | Tim Renton | 27,317 | 54.1 | |
| | Liberal | Bob Symes | 15,162 | 30.0 | |
| | Labour | M R Fraser | 7,993 | 15.8 | |
| Majority | Majority | Majority | 12,155 | 24.1 | |
| Turnout | Turnout | Turnout | 50,472 | 83.3 | |
| | Conservative win (new seat) | Conservative win (new seat) | Conservative win (new seat) | Conservative win (new seat) | Conservative win (new seat) |