[LONDON] Pro-EU candidate Sarah Olney on Friday won a parliamentary by-election in the posh London suburb of Richmond, ousting the pro-Brexit incumbent Zac Goldsmith in what will be seen as a blow for the British government.
The Liberal Democrat candidate won with 20,510 votes, ahead of Mr Goldsmith's 18,638 votes, local mayor and councillor David Linnette announced.
The race left six other candidates falling far behind Olney and Goldsmith, in a by-election which saw 41,367 votes cast with turnout at 53.6 per cent.
The vote has been widely seen as a mini-referendum on Brexit in a pro-European Union heartland, with locals turning out to support the Lib Dem centrist party that wants a second referendum on EU membership.
The Richmond election was sparked after Mr Goldsmith quit as an MP in the ruling Conservative Party following government backing to expand the nearby Heathrow Airport, vowing to stand for re-election as an independent.
The outcome will come as a shock for Mr Goldsmith, who was re-elected in the 2015 general election with a 23,000 majority.
Following his resignation from the Conservatives the party announced it would not put forward a candidate to challenge the Richmond seat.
Ms Olney, 39, is a newcomer to politics - an accountant who joined the Lib Dems only in May 2015.
In the June referendum on EU membership, 52 per cent nationwide voted to leave, but in Richmond, a well-heeled borough in southwest London, 69 per cent voted to remain in the bloc.
Its 82-per cent referendum turnout, one of the highest in the UK, showed it was an issue locals felt passionate about.
"While some people feel very strongly about Heathrow expansion, lots more people feel much more strongly about Brexit," Ms Olney told AFP during the campaign.
"That's really alarmed and upset people and they want to use this opportunity to send a message."