AHC: Labour Wins 1987

With a pod no further back then election night 1983 and now later then election night 1987 make Labour win the 1987 UK General Election.

Neil Kinnock must be Labour Leader and Thatcher must be PM.

Go.
 
The polls weren't actually too terrible for Labour in the lead up to the election, a far better Labour campaign might have produced a Hung Parliament. Find some way to destroy the Alliance, maybe an earlier, more botched attempt at a merger which leads to a weaker Liberal Democrat variant and a stronger continuity SDP. You could end up with a Labour government with Liberal supply and confidence.
 
Top