"I wonder how well our QRA would cope with a small force of say forty Russian aircraft all in individual locations and heights and with fighter escorts and their bombers actually using their ECM stuff and defensive guns?
Of course, being a sneaky first strike the Russians would probably throw in a diversion of something like two civil airliners going off track and not responding to ATC."
I doubt they would fiddle with that, if they wanted to attack UK out of nowhere they could do it much simpler. EWS won't help much if any against ballistic&cruise missiles, UK will respond with Tridents sooner or later so it really wouldn't make any difference.