Thanks for replying, I've been out and set it to the directions on
dishpointer using a compass and got a signal almost immediately, strength 90% and quality varying between 27% and 45% which is a bit more encouraging but it's only picked up channel 4 in the list so a bit of tweaking needed I think. Any suggestions which bit to move would be highly appreciated. I think Eurobird was the one I meant, I get confused easily these days

Edit to add :- Just turned the LNB and got 90% strength and 74% quality on Eurobird and Astra2D

so I'm going through the list now to see what these 500+ channels are.