Schipol hand,
Ref to your last point in relation to ceding LGW to Ryanair I don't believe this was ever the case.
Aer Lingus exited DUB LGW in wake of gulf war when they were losing money on every seat to London. That was circa 91/92. The route was vacant for most of a year until Cityflyer Express came in. FR followed on in Jan 95.
Aer Lingus did however cede routes on dublin lpl stn and Munich for a 5 year period.