Some extra information for those interested.
Contract supposedly last for one flying year. Although some are individually negotiated the basic one seems to be 1 week flying 3 weeks sim. Either based at EMA or at STN. You're allowed to pick the flights you would like to do in your flying week.
T&C's of your individual contract apply to your flying week. T&C's of your SFI contract apply to sim weeks.
Rumoured pay at €450 for each planned sim session. No figures or TRI or TRE payscales though.