I don`t trust Halfords one bit.
My Sis took her car to them in Worcester,failed the car,did £800 worth of work ( without asking permission),left the car outside till she collected (it got a parking ticket due to where THEY had parked it,refused to pay as it was not their fault).
Car was taken to an independant garage who said the work was NOT needed ( she kept the parts removed ),got in touch with trading standards & Halfords head office,told H/fords she was going to take them to court for all they had done.
She got all her money back + a £500 voucher & cost of parking ticket even though they still denied it was them who parked the car.Told them where they could put voucher so they gave her £500 cheque instead.
Oh & they said all 4 tyres were right on the limit ( they lasted another 2 years & she does 15,000 per year ! ).
Mike