Hello again,
Just been chatting with one of the Virgin Tech Support folks on virginmedia.support.tv, who identified that there is actually a problem with my V+; one of the record tuners is defective. Tech visit planned on Monday morning...! Really pleased that he was able to identify the fault so quickly, but a little puzzled that VM Customer Services thought there was a fault with all the V+ boxes and not mine
However, a happy ending none the less..!
Stubob