Thank you, IndustryInsider, for that ... erm ... inside information.

I’ll keep the inside information coming…
A temporary agreement has been reached for drivers for an enhancement on Sunday’s which means Sunday’s will join the current rest day work enhancement from next Sunday until the summer timetable change.
So time-and-a-half and a guaranteed payment of 9h30m, instead of time-and-a-quarter.
Should make a noticeable difference.