If they are doing the service I think it would be incumbent for them to make sure it was all ok and pass the MOT. Plus the stick that they had to take a few years ago meant that their whole policy changed. In 2006 I went in to a Kwik-fit garage to ask if they would check my brakes after I had changed the discs and pads and bled the brakes. They were very pleasant and checked them and gave me the all clear. All F.O.C.