commuting to LHR
Sick,
if there are enough LHR based crew you might want to do the so called "rostering option 3".
Means you fly twice a month home on duty with 7 nights layover, so total 14 night a month.
They charge you 10 days for that, means you still gain 1 annual leave day every month.
Disadvantage is that you can't pick your days anmore, but if you need special days off the help you, and you can sign off and on to that program every month.
For me it works good, is something like a part time job...
cheers,
tom744