Lost & Found/Car Park

When we got to Manchester we had an Avs rental car and drove into CityApartment Hotel which was the easy part. As with the UK not an easy place to park the car. So my wife hopped in and asked how to get to the car park. She was told it was not easy and to put the address and co-ordinates into the SatNav/GPS which I have my own with me. I did that and my GPS went mental trying to get us there, after about 20 minutes we finally found it and we were only about 200 metres from the door of the hotel. The one way system and bus only lanes made it a real excursion just to fid the car park.
After going down to Cheltenham and back again the the same hotel the GPS knew by now where to go, WRONG, it took us to a road under a bridge with a barrier across, A quick turn around corrected the GPS and we were back on track.