By Mikey Smith Labour secured a double by-election victory on Thursday – with Wellingborough’s Gen Kitchen and Kingswood’s Damian Egan taking two more seats from the Tories and spelling fresh misery for Rishi Sunak. In Wellingborough, Northamptonshire – the seat previously held by ousted MP Peter Bone – Labour demolished an 18,000 Tory majority. And in Kingswood, South Gloucestershire, they overturned an 11,000 majority to take Chris Skidmore’s former seat. The sizeable victories mega poll published by the Mirror this week suggested the Conservatives face an electoral wipeout – losing three qu…