Ott,
Tough decision,one not made lightly,and it will be the right one for you,youve given it plenty of thought,and consideration.
Chances are you could possibly have a "acclerated command" with your P1 time,but thats very variable on which fleet you end up on,as the bulk of the upgrades on the Bus this year(88 plus)
The other side is with almost 1000 pilots by year end,you could well be sitting RHS for a while,on FO pay,and wondering why you left Blighty.
Good luck,
Rommel