IOTL Thatcher had hopes of him succeeding her as PM and were it not for Sara Keays, he would've become Foreign Secretary in June 1987. Let's say Parkinson stays away from Keays, or she's not impregnated. He becomes Foreign Secretary in 1987. Assuming Thatcher still gets overthrown in 1990, could Parkinson succeed her instead of Major? Presumably he'd be much more forceful and effective with Major- following the majority of backbenchers and ordinary members on Europe and telling Hessie and Clarke to shove it instead of fighting most of the party. Obviously no chance of beating Blair in 1997 but the Tories would probably do better than OTL. Most of Major's domestic legislation still goes through. What about ERM ejection?