mate of mine paid 30 for a mot at some backstreet garage, thought he had a great deal as he had a free re test and 2 weeks to sort out any problems with it. Surprise surprise they failed it. Told him the underneath had bad corrosion and wouldnt last another year if it didnt get welded.
He was gutted so i got under and had a look for him and couldnt see anything that looked that bad so he took it to another garage for a second opinion and they couldnt find nothing either lol. Looks like they were just out to try and make more money.