The Liberal Democrats have won the Brecon and Monmouth by - election , gaining the seat from the Conservative Party . The seat was the first test of the " Remain Alliance " , in which the Green Party and Plaid Party did not stand , meaning there was only one pro - EU ticket on the ballot paper . This could provide a formula for alliances in future elections . A " Unite to Remain " initiative is currently analysing seats to see which party pro - Remain parties should back in their constituencies . Anti - EU parties have not yet formed such a pact , with the Labour Party and the Conservatives both standing in Brecon .
The Liberal Democrats have won the Brecon and Radnorshire by-election, taking the seat from the Conservative Party. The seat was the first test of the "Remain Alliance", in which the Green Party and Plaid Cymru did not stand, meaning there was only one pro-EU ticket on the ballot paper. This could provide a formula for alliances in future elections. A "Unite to Remain" initiative is currently analysing seats to see which party pro-Remain parties should back in given constituencies. Anti-EU parties have not yet formed such a pact, with the Brexit Party and the Conservatives both standing in Brecon.