Until 18 months ago GB was about the best of the bunch. Now it is just another cr*ppy airline like the easy, ryan's etc.
The top level of flight ops. management is about as incompetent as it gets, result: Roster instability, cancelled flights, low morale etc. with no light at the end of the tunnel.
95-100 hours in 28 days is pretty standard, with the t0sser responsible phoning you on your days off to beg you to help him out of the hole he created!
Best avoid it until it improves!