Dave Mabbutt, former drummer with long-gone Seventies rock band The Infinite Shamen is rich - Bill Gates-rich, Roman Abramovich-rich, or maybe as rich as both combined.

Back when his band were the hottest prog-rock property on Earth, Dave attempted to shed his huge earnings by donating to hapless innovators and inadvertently found himself launching the likes of Virgin, Starbucks and Damien Hirst. Money pours into his account but Dave is not liberated by wealth - he is miserable. Isolated and largely clueless about the way the world works, he is enormously powerful without noticing or recognising it.

The people with most influence over him are Dom, his young eager-to-please personal assistant, and his ungrateful cantankerous mum.

The series is mostly set in Dave's house. Designed by the man who did Stansted Airport, it is large enough to warrant its own parliamentary constituency, has its own radio station, amusement park, elephant enclosure, library and even its own branch of a high-street stationer.

The Richest Man In Britain paints a world that is larger than life. Each week, Dave resolves to bring himself back into contact with reality and find a sense of purpose. Every time, he fails.