Britain’s pro-European Union Liberal Democrats have won a parliamentary seat from the governing Conservatives, a blow to Prime Minister Boris Johnson in his first electoral test since taking office.

The loss reduces Johnson’s working majority in parliament to one ahead of an expected showdown with lawmakers over his plan to take Britain out of the European Union on Oct. 31 without an exit agreement if necessary.

Johnson’s government already relies on the support of a small Northern Irish party for its wafer-thin majority, with just a handful of rebels in his own Conservatives needed to lose key votes.

‘No mandate’ for no-deal Brexit

The Liberal Democrats won the Welsh seat of Brecon and Radnorshire with a majority of 1,425 votes.

“Boris Johnson’s shrinking majority makes it clear that he has no mandate to crash us out of the EU,” Liberal Democrat leader Jo Swinson, whose party now have 13 seats in parliament, said in a statement following the result early Friday.

“I will do whatever it takes to stop Brexit and offer an alternative, positive vision. … We now have one more MP (Member of Parliament) who will vote against Brexit in parliament,” Swinson added.

Wales, and the Brecon area, voted to leave the EU at the 2016 Brexit referendum, but it is also a region where sheep outnumber people and where the prospect of steep EU tariffs being slapped on Welsh lamb exports in a no-deal Brexit have prompted widespread concern among farmers.

The Brecon vote was triggered when Conservative lawmaker Chris Davies was ousted by a petition of constituents after being convicted of falsifying expenses. Liberal Democrat candidate Jane Dodds won with 13,826 votes.

Davies, who ran again for the Conservatives, came second with 12,401 votes. The Brexit Party came third with 3,331 votes, while the main opposition Labour Party was fourth on 1,680 votes.

The Liberal Democrats had previously held the seat from 1997 until 2015, when it was won by Davies. In the 2017 snap election he held the seat with a majority of just more than 8,000 votes.

No plans for election

Johnson, who took office last week, has said he does not plan to hold an election before Britain leaves the EU but could be forced to if lawmakers try to stop him pursuing a no-deal exit by collapsing the government in a no confidence vote.

The result in Brecon, where the combined vote for pro-leave parties outnumbered pro-remain, would likely add to calls for a possible Conservative-Brexit Party alliance in any upcoming election.

…