I was going to post this in the Allied Air Forces thread but I ddn't want it to get lost in there. This is a seriously good read. The Czechoslovak Air Force in Britain, 1940-1945 is the PhD thesis of Alan Brown who wrote Airmen in Exile. The thesis is available, for free, online and I would recommend a read. Download the thesis from: http://www.ssci.freeserve.co.uk/airmen/orderthesis.html The Introduction for Airmen In Exile (of which I have heard good things) can be read online too
It wasn't as simple as "come on board" we are glad to have you fight with us. Politics, Politics and more Politics.
The original link for the thesis in post #1 is now dead. However, it is still available here: http://eprints.soton.ac.uk/42318/01/0000326.pdf