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 . This is because the government's numbers don't include Charlie Elphicke, a Conservative who's had the whip removed while he fights sexual assault allegations, and a handful of opposition MPs who tend to vote with the government on Brexit. 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 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 .