Liberal Democrats leader Tim Farron. Darren Kitwood/Getty LONDON – One of the key questions heading into the June 8 general election is how many extra seats a resurgent Liberal Democrats party can realistically expect to win.

Leader Tim Farron has framed the party in unambiguous terms as the country's anti-Brexit party and has reaped the rewards in recent local elections and by-elections.

In the Richmond Park by-election in December, for example, Lib Dem candidate Sarah Olney won the seat from former Tory MP Zac Goldsmith, with a whopping 21% swing in favour her party's favour.

The Lib Dems currently have 9 MPs in the House of Commons but if Farron's party can attract enough anti-Brexit votes then this number could possibly rise to 15, 20, or perhaps even more.

Here are 9 sitting MPs who have to fight hard to fend off the looming threat of the Liberal Democrats.

Constituency-based EU referendum results are based on data published by academic Chris Hanretty.