Thanks for the list Glueball but we'd complied and the opposite traffic didn't. Like wot I wrote, he was approximately one mile away. Close enough to see silhouettes of the crew in the cockpit. We and a stream of aircraft ahead and behind were all at the correct FL. No RT from him on HF or VHF (we were working Mumbai on HF), no transponder output from him and a sudden attack of deafness from Mumbai when we called them to enquire. Wonder why? Then again they were about as much use as tits on a fish both on our way out and back so why should I be surprised?
As for the MkI eyeball, how do you think I spotted him?
weido. Funny you should write that eastern bloc aircraft were sneaking around what with this being a Tupolev. My suspicions are firming up.