Beagle,
Thanks very much for your inject there, the L29 looks exactly like what I saw. I've never seen one before, and the engines sound was a bit different to most single engined jets I've seen.
Nutloose,
I do need glasses for reading these days, but I think a Sea Vixen would have given a very different planform than what I saw. Thanks for your suggestion though, I'm sure it was well meant.
Gee Ram,
I do apologise for my ignorance of your post, I was actually trying to accentuate the silhouette of the aircraft, and failed to register your point. My sincere apologies.
Problem solved I reckon, thanks to Beagle again.
Smudge