Dominic Littlewood comes to the aid of Darren Drake, who had to pay 2000 pounds to have a new engine fitted to his one-year-old Vauxhall Astra. Dom reckons Darren should have been covered under warranty, and the plot thickens when a vicar reports a similar problem with his Vauxhall warranty. Plus, a brave insider goes undercover to dish the dirt on dodgy builders and how to avoid them.