Are you saying that on the occasion in question Thames/City/SVFR was 'band-boxed' (for whatever reason) onto 132.7 and the operative consequently did not have sufficient capacity to provide service as obliged to do so under contract? If so, there are staffing issues and/or supervisory issues which Nats should address promptly. Or do some ATCOs still have an aversion to 'tiddlers'...