Thanks for all the replies
I've just gone to the sirius website and looked at the footprints for Sirius 2 on the FSS Europe beam (where TV Sport RO is located) and got this image:
Looking at that diagram, I would say that I am in the 42,5 region quite safely (may possibly get away with 44,5 but not sure). However, looking at the second link that rolfw posted, I'm no clearer as to what size dish I would need. Anyone care to translate please?
Thanks a bunch