THE Brecon and Radnorshire Parliamentary constituency could be merged with part of Montgomeryshire.
A plan that would cut the number of Welsh constituencies cut by 11 has been published.
That would mean instead of 40 MPs elected from Wales the country would send just 29 representatives to Westminster.
The existing Brecon and Radnorshire seat would form a new constituency called Brecon, Radnor and Montgomery. The remainder of Powys’ northern county would be incorporated into a new seat called South Clwyd and North Montgomeryshire.
The new constituencies have been drawn up the independent Boundary Commission for Wales under a formula set down under the previous Conservative/Liberal Democrat coalition government.
Earlier plans to redraw Britain’s electoral map were shelved due to a disagreement between the two parties.
Voters can have their say on the proposed constituencies during a 12-week consultation, a final report is due in 2018.
In Wales, Labour which won 25 seats at the last election, is expected to feel the biggest impact of the redrawn map.
While both the existing Brecon and Radnorshire and Montgomeryshire seats are held by Conservative MPs both seats have also been considered Lib-Dem strongholds.
Constituency boundaries will change across the UK, reducing the size of the Commons from 650 to 600 seats.
However Wales will see the biggest proportional cut among the four nations.
All of the new constituencies must have at least 71,031 voters. At present in Wales, all but one of the existing seats have electorates smaller than that.
If introduced in time for the 2020 general election, the review would mean the Commons and the Welsh Assembly would no longer share the same constituencies.
The Boundary Commission said it had tried to preserve community links, but did not take political considerations into account.
Steve Halsall, secretary of the Boundary Commission for Wales, said it was an initial set of proposals.
"It has also taken into account other relevant factors and has sought to identify the solutions most suitable to local needs within Wales," he said.