I didn’t think that would be allowed the early hours of Sunday finishing the shift then start early hours the following day in such a safety critical environment.
They must take a bit of getting used to!
It’s quite common, especially for those where Sunday isn’t in the working week (and even those where it is).
Because technically it’s a RD and it’s a 24h gap so doesn’t break rules but it sure doesn’t feel like it.
It would score low on the fatigue matrix though and is regularly cited here as one of the worst parts of any roster (Sat late into Mon early).