Currently there is no fixed pattern roster (previously it was 9 and 5) so expect totally random rostering. The target is to achieve 11 days off per calendar month, averaged over 3 months.
Salary will depend entirely on which contract you are on, based on experience.
Commuting is possible, but as a UK domiciled / LEJ based pilot you will have no entitlement to jump seats to work, and only on a space-available basis for getting back. LEJ is not the easiest place to get to, most of the guys use Ryanair to Berlin, then by train.
Best of luck.