Mach Two,
Yes, there is and was QRA(I) in the UK but not held continually at the same high readiness state 24/7/365 as was required for RAF Wildenrath Battle Flight and USAF Zulu Alert. This added a whole new dimension in terms of the degree of preparations, choreography and rehearsals required to ensure that take-off times were achieved from "cold" (without pre-warning).
Just a bit of banter - of course everyone did (and still is doing) their bit regardless of location, but the crews in RAFG didn't have time for a quick trip to the "facilities".