BT
My understanding is that of birdstrikes, the CAA stance is that CAP371 will sit inside Sub Part Q BUT as it will become EU Law they will be forced to backdown and adopt Sub Part Q (much like they had to do with the Jar145 Engineering requirements). It may be that a legal challenge will have to be mounted.
In most cases (I presume Jedy including Belguim) EU airlines apart from UK will find the limits more restrictive (judging by the amount of wrangling that has gone on for the last xx years). UK Airlines would in most cases however benefit from Sub part Q, not so much the hours in the day but the removing of the early / late rules which force so many crap rosters to be worked.
It would however be hoped that respected UK Airlines adopt it with a sensible safety driven approach rather than imposing it without negotiation. I for one am uneasy about 10hrs rest away from base.