BSAC- British Sub-Aqua Club. Dive leaders may dive to a maximum of 50m with a series of depth progression dives
Dive Leader - British Sub-Aqua Club
SAA- Sub Aqua Association (UK CMAS affiliate)- Dive leaders can dive to a maximum of 50m
SAA Diver Grades
CMAS- roughly translates to World Underwater Federation. To gain a 3 star diver qualification, divers must " Successfully complete the fifty (50) meter open water training dives and the openwater assessment that shall be conducted during such dives, as provided for inClause 10.2 of this Standard.
Download the 3 star diver standards from the website here:
Three Star Diver Training Programme
I will also add the deco isn't considered a massively huge deal on this side of the world either, and isn't considered "technical diving". A BSAC sports diver (qualification after ocean diver. certifies divers to 35m after depth progression dives) is qualified to undertake dives with required decompression.
And I will add IANTD to the list. Advanced Recreational Trimix qualifies divers to 48m, using trimix and up to 15 minutes of accelerated deco