I don't know if anyone can help but I have just come back from EDI-EXT and we were coming in to land. Airport empty no aircraft on runway at all. Landing gear came down, we were flying low then all of a sudden we climbed and banked steeply, landing gear went up, we turned and were banking majorly over EXT before we descended, landing gear came down and we hit the tarmac rather hard. No explanation from flight deck so anyone at EXT got any ideas??