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?
Context: 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] ). 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. Woodford is a suburban town of North East London, England, occupying the north-western part of the London Borough of Redbridge.  Woodford is served by London Underground's Central Line.  It is located 9.5 mi northeast of Charing Cross and is divided into the neighbourhoods of Woodford Green, Woodford Bridge and South Woodford.  In the Middle Ages it was a string of agrarian villages surrounded by Epping Forest in the county of Essex.  From about 1700 onwards, however, it became a place of residence for moneyed people who had business in London.  As part of the suburban growth of London at the turn of the 20th century, Woodford significantly increased in population, becoming a municipal borough with neighbouring Wanstead in 1937 and has formed part of Greater London since 1965. 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. Wakaba Ward (若葉区 , Wakaba-ku ) is one of the six wards of the city of Chiba in Chiba Prefecture, Japan.  As of April 2012, the ward had an estimated population of 151,593 and a population density of 1,800 persons per km².  The total area was 84.21 km², making it the largest of the six wards of Chiba city. 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. East Ecclesfield ward—which includes the districts of Chapeltown and Ecclesfield—is one of the 28 electoral wards in City of Sheffield, England.  It is located in the northern part of the city and covers an area of 3.8 sqmi in the eastern part of Ecclesfield Parish.  The population of this ward in 2011 was 18,295 people in 7,863 households with a population density of 17.1 persons per hectare.  East Ecclesfield is one of the six wards that make up the Sheffield Hillsborough Parliamentary constituency.  The Boundary Commission for England, in their final report, recommended that East Ecclesfield should become part of a reformed Penistone and Stocksbridge constituency.  The East Ecclesfield ward is composed of eight polling districts.  These include Blackburn, Chapeltown, Ecclesfield, Ecclesfield Common, High Greave, Horbury, Warren and Wheata. Woodford Green is part of the suburb of Woodford in North East London.  Within the London Borough of Redbridge with a part on the western side of the green within the London Borough of Waltham Forest (this area is known as "Woodford Side") and a couple of streets on the eastern side straddling into the Epping Forest District of Essex.  Woodford Green was formerly in the administrative county of Essex, until it was absorbed into the newly created Greater London in 1965 now North East London. 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. West Ecclesfield ward—which includes the districts of Burncross, Grenoside, High Green—is one of the 28 electoral wards in City of Sheffield, England.  It is located in the northern part of the city and covers an area of 12.5 km in the western part of Ecclesfield Parish.  The population of this ward in 2011 was 17,699 people in 7,675 households.  West Ecclesfield is one of the six wards that make up the Sheffield Hillsborough Parliamentary constituency.  In their final report, the Boundary Commission for England recommended that West Ecclesfield form part of a reformed Penistone Parliamentary constituency.  West Ecclesfield is composed of a number of polling districts.  There are six in total; Angram Bank, Burncross, Grenoside 1 and 2, Mortomley and Wortley Road.
Answer: Waltham Forest