The union will push for a 9 on 3 off contract for 84% pay of a full time F/O. This is still yet to be decided and confirmed but 9 on 3 off sounds like a good option knowing how hard they work at Manch.
In anticipation of it being the next question a FULL TIME F/O starting pay is: £47305.
I therefore make a 9 on 3 off contract worth £39736pa and the 8 on 4 off option is approx £3200pa less.