Two weeks ago, my grandson bought a 2015 Vauxhall Corsa 1.2 for just over £6000 from a main Vauxhall dealer. It came with a one year warranty and the car is on credit taken out with them. Last week, he had to be towed back to the garage by the AA. They could not give him a loan car because he's 18 years old and, after stripping down the engine, were unable to find the fault. They will have to get someone from Vauxhall to look at it, so we've been given no time estimate as to when the car will be back. Could you please tell me what his rights would be and what he should do?