Grand Designs returns for its incredible 18th season tonight. Take that, Dermot Bannon. It seems we just can't get enough of nosing around people's gaffs and watching the fallout when their dream home isn't going to plan. Tonight, after a four year stint living in New Zealand, ex-RAF pilot Jon and GP Gill Flewers want to build a Kiwi-style hill house on the slopes of the Malvern hills in Worcestershire. They plan to build an ambitious three-storey home clad in wood and stone, but the pair encounter problems as the site is so steep builders do not want to take on the job. Sounds like a job for..... Dermot Bannon, Kevin McCloud!