Sarah, 40, is an accountant and lives in North Kingston; she lives with her husband Ben, a town planner, and their two children, Isabel, 7, and Rufus, 3.

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She has always been a Liberal Democrat voter but was moved to join the Liberal Democrats by Nick Clegg’s inspiring speech after the 2015 general election. “I realised then that it was no longer enough to sit cheering from the side-lines,” she says. “I needed to play an active part in the Liberal Democrat fightback, and campaign for a Britain that was open, tolerant and united.”

It was Conservative plans to introduce a Brexit referendum that fired her determination to stand for Parliament.

She has taken up the two-decade long Liberal Democrat cause of opposing a third runway at Heathrow. As an asthmatic, she knows first-hand how pollution damages the quality of life locally. “Only the Liberal Democrats are united in fighting Heathrow expansion, as we are in fighting Brexit and for proper NHS funding,” she says. “On these big questions, the Conservatives are totally divided and are driving through measures that are massively damaging to the constituency. Richmond Park desperately needs a local champion who understands the economic pressures and the everyday problems like trying to get a doctor's appointment. I want to be the person who stands up for local people.”

Sarah will campaign on improving the NHS, local transport, supply of affordable housing and schools

While not knocking on doors, her weekends are often spent teaching her kids to ride their bikes in her beloved Richmond Park.