Then the Brit’s would do their SAS.
The Royal Marines have the SBS as their elite squadron, special boat squadron or service it’s called now. SAS draws candidates from all branches of the military including Royal Marines but many suggest SBS is the most elite of the special operators.
Royal Marines are great fighting men, like the Parachute Regiment they are considered the most capable infantry soldiers in British military, but they are not special forces, they are like the US Marines in that regards.
The biggest difference was they didn’t have many if any women fighting, only discreet poofters not flaming faggots, no low iq diverity hires, no trannies and no indoctrination in globohomo wokeness enforced in their training. Their officers tend to attract an upperclass career patriotic Brit too.