54plate, just done 70,000 miles, it was strange, i was doing about 60-70mph and changed from fourth to fifth, heard a noise, so i put it to neutral and coasted to a layby,looked under the car as there was noise of something dragging under neith,i had a look and the heat shield had dropped down, so i assumed it was just that, but as i drove back home which was only 2 miles max away, the engine management light came on and the battery light came on, but i assumed that they came on because the lamba sensor cable runs through the heat shield. and must of pulled on it as it dropped down, how wrong i was,so i went to take it to my local garage this morning and it would not find 5th or 6th gear. it still drives in gears one to four would it still be safe to drive back to the garage it came from, which is about 35miles from my home, or could i do more damge?