Waffler
Jumping ships isn't really an option when your on a 3 month notice period, more of a slow crawl.
If IAG acquire bmi and some of the slots are used for long haul routes then that will likely require more not less pilots, i can't see any pilot redundancies from LHR out of this, but until a deal is sealed and a plan set out a premptive jumping of ship would seem a higher risk than staying put?