Thank you all for your comments in the light of which here's Flight Lieutenant Basil's opinion (Yes, even the lower orders have an opinion even if it may not have the validity of that of a VSO).
With hindsight, the PM should have responded that we do not discuss that sort of thing publicly and that includes Parliament which is a public forum. OTOH, she DID take the opportunity of a good sideswipe at The Leader of the Opposition.
Re the comments by Admiral Lord West:
The Admiral should be ashamed of himself.
The Lord? Well, just another point-scoring pollie.