Each year, more than 100,000 building jobs in the UK go horribly wrong and it’s often the builders who end up with the blame. But the reality is, it’s a two way street.

Putting on his hard hat, Jeff Howell brings all his experience to each site to mediate between the warring builders and home renovators. His aim: to bring the two sides back together and get the building work back on track. In well-to-do West Hampstead, a couple are having a ?43,000 extension to their flat. They met their builder at the funeral of a mutual friend, but the relationship soon turned sour. Can Jeff save the day?

Tuesday 12 August 2008, Channel 4 8PM