From what I hear, the requirements are ;
A320. LGW, LTN, BHX and MAN. A hard working fleet doing most of the schedules and with the 330 to look forward to.
B757. LGW and MAN only. A hard word working summer fleet at LGW with lots of night flights. 767 takes a couple of years.
A300. LGW and MAN only. Still lots of debate as to whether they will be around for long so may not be offered. Short of F/O's at the moment for reason just mentioned. Good if you can get it.
B787. Prepare for lots of backstabing and tantrums!
Not too much positioning in taxis if LGW or MAN based.