Assuming you want to receive Astra2D (the one with Sky and the BBC channels on it), You should point your dish at 144 degrees true (Azimuth) using a compass and elevate it to 28.6 degrees from the horizontal. This is about 3-4 degrees higher elevation than if you were in the South of England. Because of the way dishes are shaped with an offset focus, the front face will be pointing only slightly above the horizon. If you dont have a calibrated bracket it would be worthwhile checking it at home and then setting it to a higher angle when you get there.
It does work if you keep away from the trees - trust me!