Post match i almost always use Northumberland Park. Exit the away end & turn immediately left - walk along Park Lane (past the stalls & burger vans). A 10 min straight walk will get you to NP. There are very rarely queues. Cross the footbridge to the opposite platform. Get off at Tottenham Hale...
23:04 from London Bridge is easily doable. Catch the 21.58 or 22.12 from Northumberland Park to Liverpool St, then Tube, Bus, Cab or walk to LB.
If it goes to extra time, Uckfield is a non-starter.