# Nucleus (advocacy group)

Part of a series of articles on :
Brexit :
Withdrawal of the United Kingdom from the European Union
Glossary of terms :
Background
European Communities Act
1975 EC membership referendum
UK rebate
Bruges speech
No. No. No.
Maastricht Rebels
Black Wednesday
European Union (Amendment) Act 2008
European Union Act 2011
UK opt-outs from EU legislation
Euroscepticism in the UK
UK opinion polling on EU membership
Campaigns for a referendum
People's Pledge
Labour for a Referendum
Bloomberg speech
In or Out
2013–14 EU (Referendum) Bill (unsuccessful)
2014 European Parliament election
2014 UK Parliament by-elections
Clacton
Heywood and Middleton
Rochester and Strood
2015 UK general election
2015–16 EU membership renegotiation :
2016 EU referendum
EU Referendum Act (Gibraltar)
EU Referendum (Date of Referendum etc.) Regulations
EU Referendum (Conduct) Regulations
Issues
Endorsements
Opinion polling
UK Government pro-EU leaflet
Campaigns
Leave campaigns
Vote Leave (official)
Business for Britain
Conservatives for Britain
BeLeave
Leave.EU
Bpoplive
The Freedom Association
Better Off Out
Grassroots Out
Labour Leave
Get Britain Out
Bruges Group
Campaign for an Independent Britain
Brexit: The Movie
Remain campaigns
Britain Stronger in Europe (official)
Labour In for Britain
European Movement UK
Britain in Europe
British Influence
Business for New Europe
Nucleus
Project Fear
Outcome
Results
Causes for result
International reactions
Immediate aftermath
2016 Conservative Party election
2016 Labour Party election
2016 UKIP election
Department for Exiting the EU
Department for International Trade
Allegations of unlawful campaigning
Alleged Russian interference :
Notice of withdrawal
Article 50 process
Miller case (Article 50)
EU (Notification of Withdrawal) Act 2017
Brexit plan
Repeal Bill plan
2017 UK general election :
Negotiations
Negotiation positions
EU negotiation mandate
Chequers agreement
Timeline: 2017, 2018, 2019
2019 European Parliament election
2019 UK general election :
Withdrawal agreement
Brexit divorce bill
Fish for finance
Irish backstop
No-deal Brexit
Northern Ireland Protocol
Northern Ireland Protocol Bill
Windsor Framework :
Legislation
Withdrawal Act 2018 (Gibraltar)
Nuclear Safeguards Act 2018
Cooper–Letwin Act
Benn Act
2019 suspension of rebel Conservative MPs
Public Vote Bill (not passed)
Terms of Withdrawal Bills (not passed)
Scottish EU Continuity Bill (blocked)
Withdrawal Agreement Act (Gibraltar)
Scottish EU Continuity Act
Internal Market Act
EU (Future Relationship) Act
Retained EU Law (Revocation and Reform) Bill :
Impact
Impact on the Irish border
Good Friday Agreement
Impact on the EU
Economic effects
Effects on Gibraltar
Scientific cooperation
Retained EU law
2021 Jersey dispute :
EU–UK relations
Relations pre- and post-Brexit
EU–UK trade negotiation
EU–UK Trade and Cooperation Agreement (TCA)
Partnership Council
Partnership Assembly
Relations with EU member states
Austria
Belgium
Bulgaria
Croatia
Cyprus
Akrotiri and Dhekelia
Czech Republic
Denmark
Estonia
France
Germany
Greece
Hungary
Ireland
Ireland–UK border
British–Irish Council
North/South Ministerial Council
Italy
Lithuania
Malta
Netherlands
Poland
Portugal
Romania
Slovakia
Spain
Status of Gibraltar
Gibraltar–Spain border
Sweden
Conjectured EEA membership :
Opposition
Post-referendum opinion polling
New initiatives
Change Britain
More United
Open Britain
The New European
Unite to Remain
Led By Donkeys
Revoke Article 50 petition
Postcards from the 48%
Proposed second Scottish independence referendum
Calls for a second referendum
People's Vote
Britain for Europe
European Movement UK
For our Future's Sake
Healthier IN the EU
InFacts
Open Britain
Our Future Our Choice
Scientists for EU
Other organisations
Best for Britain
Bollocks to Brexit
Change UK
Liberal Democrats
Right to Vote :
Timeline Bloomberg speech Jan 2013 Referendum Bill blockedJan 2014 European Parliament election May 2014 2015 general election May 2015 Renegotiation begins Jun 2015 Referendum Act passed Dec 2015 Renegotiation concluded Feb 2016 Referendum held Jun 2016 David Cameron resigns as PM Jul 2016 Theresa May becomes PM Jul 2016 Article 50 judgement Jan 2017 Brexit plan presentedFeb 2017 Notification Act passed Mar 2017 Article 50 invoked Mar 2017 Repeal Bill plan presentedMar 2017 2017 general election Jun 2017 Brexit negotiations begin Jun 2017 Withdrawal Act passedJun 2018 Chequers plan presented Jul 2018 Withdrawal agreement plan presented July 2018 Withdrawal agreement released Nov 2018 Scottish Continuity Bill blockedDec 2018 Meaningful votes Jan–Mar 2019 Brexit delayed until 12 April Mar 2019 Cooper–Letwin Act passed Apr 2019 Brexit delayed until 31 October Apr 2019 European Parliament election May 2019 Theresa May resigns as PM Jul 2019 Boris Johnson becomes PM Jul 2019 Prorogation and annulment Aug–Sep 2019 Benn Act passed Sep 2019 Withdrawal agreement revised Oct 2019 Brexit delayed until 31 January Oct 2019 2019 general election Dec 2019 Agreement Act passed Jan 2020 UK leaves the European Union Jan 2020 Implementation period begins Jan 2020 UK–EU trade deal agreed Dec 2020 Future Relationship Act passed Dec 2020 Scottish Continuity Act passed Dec 2020 Implementation period ends Dec 2020 New EU–UK relationship begins Jan 2021 UK–EU trade deal ratified Apr 2021 Windsor Framework released Feb 2023 Windsor framework adopted Mar 2023 :
EU portal
UK portal :
vte :
Nucleus was a British-European advocacy group, the forerunner to British Influence (sometimes The Centre for British Influence). Nucleus was based in London, with additional operations in Brussels.
Founded in 2010, Nucleus promoted a 'euro-realist' British approach to European political and business affairs. As well as regular bulletins, Nucleus produced commentaries, and hosted briefings, seminars, and networking events both in London and Brussels. Nucleus was unaffiliated with any political party, and was a partner in both the British Brussels Network, along with Business for New Europe, the British Chamber of Commerce in Belgium, and the Institute of Chartered Accountants in England and Wales, and the pan-European EuropAssociation.
In 2013 Nucleus relaunched as British Influence, with a heavier campaigning focus, in response to the call by Prime Minister David Cameron for an in/out referendum on the UK's European Union membership