UK ATC will inform pilots when the RVR is below the 'Absolute Minima' for a visual approach. Should a pilot still elect to continue, ATC are required to report the facts, having advised the pilot accordingly.
ATC don't normally impose Wx related 'Approach Bans'. They do give pilots the facts, and are sometimes obliged by the regulations to warn pilots, on the R/T, of the consequences of continuing a particular action.