Almost all Shropshire MPs could find themselves fighting radically revised constituencies during the next general election, it has been claimed.

The constituency boundaries of North Shropshire MP and Northern Ireland Secretary Owen Paterson are expected to remain untouched under moves to redraw the UK’s electoral map.

But the rest across the county – Telford (MP David Wright), The Wrekin (MP Mark Pritchard), Shrewsbury and Atcham (MP Daniel Kawczynski) and Ludlow (MP Philip Dunne) – will see some change, according to Conservative strategist Robert Hayward.

The former MP and advisor to the party on boundary reviews and electoral matters has produced a list of just 61 constituencies he forecasts will be unchanged.

These include 10 in the West Midlands, including Mr Paterson’s constituency.

The list also includes seats held by Cabinet ministers including Foreign Secretary William Hague, Defence Secretary Liam Fox, Culture Secretary Jeremy Hunt, as well as Ed Miliband’s constituency.

The West Midlands political map is to be transformed under the Tory-Lib Dem Coalition’s plans to equalise the size of parliamentary seats and cut the number of MPs from 650 to 600.

The region, which includes Birmingham and the Black Country, Staffordshire, Shropshire, and Worcestershire, will see its parliamentary representation reduced from 59 to 54 MPs under the biggest review of constituency boundaries in history.

Constituencies across the whole of Britain are to be reviewed and changed to have roughly the same number of voters, about 75,000.

The Boundary Commission in England has been charged with mapping the new constituencies. Proposals for England, Scotland and Northern Ireland are to be published next week.

The majority of existing constituencies are likely to be affected.

England will lose 31 MPs (from 533 to 502), Wales 10 (40 to 30), Scotland seven (59 to 52) and Northern Ireland two (18 to 16).

Speculation about the overhaul has been rife since it was confirmed earlier this year.

Scores of party colleagues could find themselves pitched into battles to contest merged seats, while others find that their previously comfortable majorities have been reduced.

By London Reporter Sunita Patel