A former Tory leader whose constituency will be torn up by the Boundary Commission proposals has been left “very surprised and disappointed” by the plans.

Iain Duncan Smith, who has represented either Chingford or Chingford and Woodford Green in Westminster since 1992, is now looking in detail at all the options presented by the commission’s report, released today.

Under the plans, his constituency will be split and its two Redbridge wards, Monkhams and Church End, will form part of a reinstated Wanstead and Woodford constituency.

Mr Duncan Smith, who is also the Work and Pensions secretary in the coalition government, said: “I am very surprised by the unexpected announcement by the Boundary Commission.

“I am still the member of parliament until the next general election and the concerns of my constituents remain my concerns.”

A spokesman for the MP added that after looking closely at the proposals, Mr Duncan Smith may be talking to local people about how they can oppose the changes.

He said: “Mr Duncan Smith doesn’t want to have to make the choice between Chingford and Woodford Green so of course he is disappointed.”

Elswhere in Redbridge the report recommends abolishing the historic Ilford South constituency, moving wards from the existing area into Barking and Dagenham, East Ham, Ilford North and the new Wanstead and Woodford seat.

The draft changes will see the number of MPs in England reduced from 532 to 502 before the next election, and it will see a number of senior politicians, like Mr Duncan Smith, switch seats in an attempt to keep their place in Westminster.

The Boundary Commission for England is an independent public body that reviews all parliamentary boundaries. It is holding a public consultation on the initial proposals between now and December 5.