Denti - my apologies - I did not read 1.12 fully. I see that hotel to report is not 'duty', so the 30 min 'max allowance' the UK had in CAP371 has gone. Presumably therefore you can sit in traffic in the bus from the hotel for 1hr+ and not be 'on duty'.
Regarding FDP, it has always, in my experience in the UK, ended either at on chox or +15 as above, and has never been 'grey', but I see it can be in EU-OPS.
Incidentally, is 371 still applicable to UK ops or is the whole of Europe fully 'signed-up' to EU-OPS?