I took our cars in to Halfords autocentres Farnham Road Slough on Saturday 13th July 2019 for MOT's . Firstly my vehicle, it failed. My brake pedal rubber had come off and was in the footwell next to the pedal, he didn't just put it back on he failed it. Then I stated could they please replace it, so they did and it passed and then the reception guy stated I owed him money, to which I answered, it was a free MOT, oh he said we aligned your headlights so that's £15, they should have advised me the work needed doing, not just gone ahead and done it. Then they stated I needed a new anti role bar, bearing in mind I had Mylar serviced not 3 months earlier at BMW and it didn't even show up on their future advisories. Secondly my partners vehicle ran 1/2 hour late, they asked whether really wanted it doing ? Of course we wanted it doing - total incompetence! Bearing in mind last year he had his MOT done bathe ministry and it passed with no advisories. On completion were told the windscreen had failed due a mark on it. I stated to the reception guy that we had a ministry MOT last year with no advisories, his reaction was aggressive and he said we have nothing to hide etc so I asked him to Show me the mark, it was a stone chip in. The top corner , not impairing drivers vision and it was there last year, outside it turned into an argument. The tyre was defective also showing just 2mm of tread ? This car has only done 5000 since last year, the ministry would have had an advisory on this last year if it was low ? Monday 14th July I will be escalating my formal complaint to Halfords CEO and I require our vehicles to be re-tested by the ministry. In future we WON'T BE USING THIS COMPANY AGAIN