2 Weeks ago I had my Vauxhall Antara in for a full service and MOT to of which it passed. On getting the car back i noticed on a couple of occasions that the handbrake wasnt engaging properly on a hill and even a very slight incline and the car would roll backwards. Even when left in gear. It has now gone back to the Vauxhall dealer and on examination they have told me that there is something wrong and it will cost a min of £130 to fix. My question is should this not have been picked up when it went in for it's MOT and if so failed.