Jeremy Corbyn and George Osborne are reportedly among the losers of a major shake-up of Westminster seats. The Labour leader could see his Islington North seat split between two new constituencies called Finsbury Park & Stoke Newington and Hackney Central, the Evening Standard reports.

The new seat looks set to include the existing seat of hackney North and Stoke Newington – currently held by shadow health secretary Diane Abbott, as well as he Islington South & Finsbury, seat held by shadow foreign secretary Emily Thornberry.

However, a source close to the Corbyn – who has just reached the milestone of one year since he became Labour leader – said there was "every reason to believe that Jeremy will still have a seat to contest", as nearly 60% of the new Finsbury Park & Stoke Newington constituency is made up of areas currently in Islington North, the constituency he has been represented as an MP for more than 30 years.

Elsewhere Osborne, the former Tory Chancellor, could see his Cheshire seat of Tatton split between fellow Conservative MPs Graham Brady and David Rutley, The Telegraph claimed. The plans are part of a review from the Boundary Commission for England, which could not comment on the reports because of a midnight embargo.

The changes formed part of a move first ordered by former PM David Cameron to reduce the number of MPs from 650 to 600, with Labour expected to be hit the hardest. The number of MPs will be cut from 533 to 501 in England, from 59 to 53 in Scotland, from 40 to 29 in Wales, and from 18 to 17 in Northern Ireland, with claims that a majority of the 43 seats from England and Wales are currently in Labour-held constituencies.

Writing in The Telegraph, Constitution Minister Chris Skidmore said: "In order to establish a democracy that works for everyone, we need our democracy and our parliamentary system to represent everyone equally.

"When Britain first swept away the system of rotten boroughs we did so in order to promote fairness and restore integrity to our electoral system. In the twenty-first century, we must do the same again."

Jeremy Corbyn
Jeremy Corbyn’s Islington North seat is reported disappear in a new map of boundaries Jack Taylor/ Getty Images