RE: CSA
I’ve flown on CSA several times from Heathrow to Prague Ruznye on their 734s. I wasn’t aware that they were still operating Soviet aircraft, I thought that their fleet now only consisted of 734s, ATR 72s and A310s.
I also flew on them a while back from Gatwick in a Fokker 100 as well, I think it might have been a charter flight, and I don’t think they are still flying the F100. That was possibly the most insecure plan I’ve ever been in!
CSA are definatley a good airline though, however I think they’re in danger of losing out on routes to the UK to low fares carriers. Definatley worth a look though!