If its eurofleet your going to AVOID LGW LIKE THE PLAGUE
LGW is a different contract to mainline BA and the crew work a lot harder with very few nightstops and to transfer to WorldWide you have to go through Eurofleet LHR first anyway!!!! So you could be up to 5 years before you get moved to Eurofleet LHR and then another three to five years before you get Longhaul as your seniority starts all over when you change from the Gatwick Eurofleet contract to the mainline one.
You also only get trained for the 737's although a A319 is flying out of gatwick this summer as an extra. In LHR you have a lot more routes and nightstops, earn a lot more money, trained on Airbus, B757'S, B767's and can operate the occasional longhaul route on the 767!!!
I would really recommend LHR if you are given the choice!!!