By Jessica Frank-Keyes While the next general election may still be 10 long months away, MPs are nonetheless quitting in their droves. With the Conservative government staring down Labour’s 20-point poll lead, it’s perhaps unsurprisingly our politicians are preparing for life after parliament. Labour, which has undergone turmoil of its own under former leader Jeremy Corbyn, has also seen a number of high-profile figures reveal plans to step back. CityA.M. has rounded up all the London MPs who are preparing to quit at the next election: Karen Buck (LAB)Labour’s Karen Buck, 65, the MP for Westmi…