I know he is!
Tell him your contacting vosa to come & inspect it & you think its a hooky mot
vosa will rip the garage apart & go through all the previous mots & paper work
they wont want the hassle, plus you will be contacting
the financial Ombudsman to fight your case they will get your money back
he will brick it even more, but the legal side is that the dealer has to be
given the chance to do the repairs (he prob wont know this)