You'd still have to think twice. Several Captains at LGW have gone back RHS to get some work/life balance back despite the pay cut of circa £15k p.a. Until recently I never considered such a move, but I think about it more and more seriously on a daily basis now. The only thing holding me back at the moment it the fear of a career average pension scheme, which would make it important to stay LHS despite the crappy lifestyle at LGW.
I don't think that DE LH Captains would happen in BA like it is happening in EK.