The Liberal Democrats have caused a major upset in the Richmond Park by-election, overturning a 23,015 majority to oust ex-Tory MP Zac Goldsmith.

Mr Goldsmith stood as an independent after leaving the Conservative Party in protest at the government’s decision to back a third Heathrow runway.

But Lib Dem Sarah Olney, who is also opposed to Heathrow expansion, fought the campaign on the issue of Brexit.

Labour’s Christian Wolmar lost his £500 deposit as he trailed a distant third.

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The other five candidates also lost their deposits as they did not receive a big enough share of the vote.

Ms Olney polled 20,510 votes to Mr Goldsmith’s 18,638.

The Conservative Party, UK Independence Party and Green Party did not field candidates.

As the new Lib Dem MP for Richmond Park and North Kingston, Ms Olney will be the party’s only female MP – joining eight male colleagues.

She said the by-election result was a rejection of the “politics of anger and division”.