Honza17, welcome indeed. I've just read the posts you mention and it seems quite a few here remember your Dad in ATC. What isn't clear though is his career as a pilot that preceded his time in ATC and that is hopefully where you come in!
If the stories of those who served as RAF aircrew in WWII (with or without the OP Pilot Brevet) are to be told from now on, then it has to be the next generation that tells them. Presumably he was a pilot already in Czechoslovakia when it was consumed into becoming a Reich Protectorate? So if you can start there and let us know all that you know about those desperate years, how he got to the UK, and what stations and units he served on, then others here can add the dots and crosses of his odyssey. Hopefully you have his log books and perhaps other paperwork, without which no military organisation can move an inch.
So over to you. You have resurrected this wonderful thread from the depths back to page one. Well done! Hopefully we can keep it bobbing about here, in its rightful place.
The Poles and Czechs were ever present in the RAF family of my day. We owe them much, and it is here that the younger generation can learn why they are remembered with such affection.
Again, welcome.
Chug