Thanks all, that clears some of the mystery. Yes, my account is based in Malta - so that could be the problem - CWS, it seems that you are one of the privileged few. Like most of us I would rather look things up online rather than sit on the phone, but there is not even an online list available. all very tiresome.

Thanks Hiddy, for the tip - and Kay, I never thought about looking on the Avios site itself - I will give it a try.