So, front lower ball joint dust covers deteriorated and failed MOT. The dust covers cost £6.40. As Halfords wanted to replace half the car at a cost of £900, I did it myself at a leisurely pace in less than 2 hours. Then the £15 retest ! The retest booking was for 12.40 hrs; very precise and I thought that was a dedicated appointment. On the day, pressed for time, I enquired if I could be fitted in earlier. I was told that all retests are based on “drop off and leave it with us” but as only one tester was working then there were no guarantees. I may have formed the wrong impression but it seems to me that not only do Halfords come up with the most expensive repair solutions for MOT work they also have little interest in accommodating £15 MOT retests for those who wisely chose not to rely on their services for such repairs.