My main problem is my car went in for its MOT at the Guildford branch, and it failed.

They said that it failed because:
1) both headlamps aim are too low
2) offside rear brake binding
3) offside rear brake disc in such a condition that it is seriously weakened

I was quoted £185 each for the brake calipers and the other items totalled £292, so a total of £652 was quoted.

I did not accept this and took the car away.
I drove it to another test centre on 10th October and told them what work I would probably require.
They carried out the MOT before any work took place to see if the calipers required changing.
They passed my car and said
1) my headlamps are aligned fine
2) my calipers passed
3) although my offside rear brake is worn and my disc is rusty, they are within the legal measurements and are just advisory items

So, I feel that I cannot trust the National Tyre centre at all. This is very disappointing after the first excellent work and service I received when I had my tyre changed there.
I feel as if they were trying to carry out work which did not require doing, and that they hoped that I would have the work carried out straight away because it had failed the MOT.

I hope that they will look into this matter and actually do something about it. Time will tell. They still haven't confirmed that they have resolved the first problem. I booked the MOT online for the Saturday before at 12pm. When I got there, they told me that they do not have MOTs at 12pm, the last one is at 11am. So, I had to go back the next week.

In all, a very disappointing experience.