Mazal Tov Mike! Yes, it is indeed the Short SA.4 "Sperrin". One wonders what it's name would have been brought into service. A small batch of, say 24 aircraft, just incase? I'll guess (based on Royal Navy ship's names): Vanquish.
I see you're a new member Mike, welcome to the family! Glad to have you on board, and well done for taking part in the Quiz. Right, over to you, your turn to ask a question (not that I'm biased, but questions involving British or Israeli subjects will go down very well with this member!).
Agree with you about the V-Bomber force. OK, so the Valiant was a WWII technology aircraft, but the Vulcan always appears in the top few most beautiful aircraft, and, of course, was still operational 3 decades after coming into service. It, of course, carried out the world's longest bombing raid (on Port Stanley). The Victor was too operational much later, I believe it lasted later too in service (as a tanker). Of course, the Victor was regarded as more advanced than the Vulcan, but just didn't look as nice. Still, even in the 1980's the Vulcan's would still be able to do things that no one else could do, as the Red Flag exercises proved.
I just hope Trumpeter, or someone, brings out a nice 1/72 V-Bomber force. Would be stunning!