Thanks, problem sorted. I now have 100% signal strength and quality on the correct satellite.
I was convinced that I'd set the azimuth correctly, using my fancy hiking compass, completely overlooking the fact that the metal in the satellite mount ( or possibly the spanner in my hand ) was skewing the compass reading.
Sorted this by marking the angles remotely onto a piece of card, straight away obvious that dish was not pointing in correct direction.
Thanks again,
Richard