Question: Which borough of London is represented by Iain Duncan Smith and includes Hatch Lane ward, which is one of six wards of the Chingford and Woodford Green Constituency?

full_context: Document 1: Dartford (UK Parliament constituency): Dartford is a constituency represented in the House of Commons of the UK Parliament since 2010 by Gareth Johnson of the Conservative Party. The constituency is currently the longest-valid 'bellwether' constituency in the country as the party of the winning candidate has gone on to form the government in every General Election since 1964. Candidates for the largest two parties nationally have polled first and second since 1923 in Dartford.
Document 2: David Cameron: David William Donald Cameron ( ; born 9 October 1966) is a British politician who was Prime Minister of the United Kingdom from 2010 to 2016 and Leader of the Conservative Party from 2005 to 2016. He was Member of Parliament (MP) for Witney from 2001 to 2016. Cameron identifies as a One-Nation Conservative, and has been associated with both economically liberal and socially liberal policies.
Document 3: Iain Duncan Smith: George Iain Duncan Smith (born 9 April 1954), often referred to by his initials IDS, is a British Conservative Party politician. The Secretary of State for Work and Pensions from 2010 to 2016, he was previously the Leader of the Conservative Party and Leader of the Opposition from 2001 to 2003. He was first elected to Parliament at the 1992 general election as the MP for Chingford—which he represented until the constituency's abolition in 1997—and he has represented its successor constituency of Chingford and Woodford Green ever since.
Document 4: Hackney Downs (ward): Hackney Downs is a ward in the London Borough of Hackney, corresponding roughly to the Hackney Downs area of London, UK and forms part of the Hackney North and Stoke Newington constituency.
Document 5: Conservative Party (UK): The Conservative Party, officially the Conservative and Unionist Party, is a centre-right political party in the United Kingdom. It is currently the governing party, having been so since the 2010 general election, where a coalition government with the Liberal Democrats was formed. In 2015, the Conservatives led by David Cameron won a surprise majority and formed the first Conservative majority government since 1992. However, the 2017 snap election on Thursday 8 June resulted in a hung parliament, and the Conservatives lost their parliamentary majority. They are reliant on the support of a Northern Irish political party, the Democratic Unionist Party (DUP), in order to command a majority in the House of Commons through a confidence-and-supply deal. The party leader, Theresa May, has served as both Leader of the Conservative Party and Prime Minister since 13 July 2016. It is the largest party in local government with 9,237 councillors. The Conservative Party is one of the two major contemporary political parties in the United Kingdom, the other being its modern rival, the Labour Party. The Conservative Party's platform involves support for free market capitalism, free enterprise, fiscal conservatism, a strong national defence, deregulation, and restrictions on trade unions.
Document 6: Andrew Smith (British politician): Andrew David Smith (born 1 February 1951) is a British Labour Party politician who was the Member of Parliament (MP) for Oxford East from 1987 until 2017. He served in the Cabinet as Chief Secretary to the Treasury from 1999 to 2002 and then as Secretary of State for Work and Pensions from 2002 to 2004.
Document 7: John Major: Sir John Major, {'1': ", '2': ", '3': ", '4': "} (born 29 March 1943) is a British politician who was Prime Minister of the United Kingdom and Leader of the Conservative Party from 1990 to 1997. He served as Foreign Secretary and then Chancellor of the Exchequer in the Thatcher Government from 1989 to 1990, and was the Member of Parliament (MP) for Huntingdon from 1979 until he retired in 2001. Since Margaret Thatcher's death in 2013, he is the oldest living former Prime Minister.
Document 8: Conservative Party (UK) leadership election, 2003: The 2003 Conservative Party leadership election was caused by the enforced resignation of incumbent leader Iain Duncan Smith after the loss of a confidence vote among his parliamentary party. The causes of Duncan Smith's fall are often cited as his lack of charisma and impact with the public, the uninspired direction of the party under his leadership, and his previous failure to achieve more than a third of support among Members of Parliament in the 2001 leadership contest. In the event, the Conservative Party coalesced around Michael Howard as replacement leader and there was not a contest to replace Duncan Smith.
Document 9: Hatch Lane (ward): Hatch Lane Ward is a political division of the London Borough of Waltham Forest, and is one of the six Waltham Forest wards of the Chingford and Woodford Green Constituency represented by Iain Duncan Smith MP.
Document 10: George Osborne: George Gideon Oliver Osborne, (born Gideon Oliver Osborne; 23 May 1971) is a British Conservative Party politician, who was Member of Parliament (MP) for Tatton from June 2001 until he stood down on 3 May 2017. He served as Chancellor of the Exchequer under Prime Minister David Cameron from 2010 to 2016. He has been editor of the "London Evening Standard" since May 2017.
Document 11: The Hale: The Hale is an area and ward within the London Borough of Barnet. It comprises the eastern part of Edgware and centres on the small retail centre at the junction of Deans Lane, Hale Lane and Selvage Lane. This centre constitutes Upper Hale, but is much better known locally as the 'Green Man' after the erstwhile pub of the same name that stood at the site from at least the early 18th century. A smaller area that was traditionally known as Lower Hale centres on the junction of Hale Lane, Farm Road and the nearby bridge over Deans Brook; this area is generally regarded as being within Edgware. The traditional area known as The Hale extends northwards from the 'Green Man' to the A41 and Apex Corner and the southern end is traditionally marked by the disused Edgware and Highgate railway line just south of West Way and Hale Drive; beyond lies Burnt Oak. Today's borough ward has slightly larger boundaries.
Document 12: Chingford Hatch: Chingford Hatch was one of the three hamlets comprising the old parish of Chingford, before the area was developed in the nineteenth century. The name is still widely used for the area immediately around Hatch Lane (A1009) at the foot of Friday Hill (OS Grid Reference [ TQ389930] ).
Document 13: Hackney London Borough Council: Hackney London Borough Council is the local government authority for the London Borough of Hackney, London, England, one of 32 London borough councils. The council is unusual in the United Kingdom local government system in that its executive function is controlled by a directly elected mayor of Hackney, currently Philip Glanville of the Labour Party. Hackney comprises 19 wards, each electing three Councillors. Following the May 2014 election, Hackney London Borough Council consists of 50 Labour Party councillors, four Conservative Party councillors and three Liberal Democrat councillors. The council was created by the London Government Act 1963 whereby it replaced three local authorities: Hackney Metropolitan Borough Council, Shoreditch Metropolitan Borough Council and Stoke Newington Metropolitan Borough Council.
Document 14: Watling Chase Community Forest: Watling Chase Community Forest is an area of 72 square miles located in north London and south Hertfordshire around the towns of Potters Bar, Radlett, Borehamwood and Barnet. It includes Aldenham Country Park, Scratchwood, Moat Mount Open Space and the Watling Chase Timberland Trail, a waymarked walk of 16 kilometres.
Document 15: Chingford Green (ward): Chingford Green Ward is a political division of the London Borough of Waltham Forest and is one of the six Waltham Forest wards of the Chingford and Woodford Green Constituency represented by Iain Duncan Smith MP.
ground_truth: Waltham Forest