[Stuart]

BBC One was London, but there were two versions of ITV - Channel Islands (which I suppose is the nearest region and kind of fitting for the Canary Islands) and bizarrely Border. There was also STV, and not even the central belt version, it was the Grampian version.

If they were pulling them from DSat (with a very large dish), then they will have selected BBC One London for obvious reasons. ITV1 regions are all labelled just 'ITV1', so they probably picked the first one they found. The same goes for STV.