His reputation for mistakes was the making of Walker. He was the fan who happened to be given the keys to the commentary box – and never wanted to give them back. His high-octane delivery kept viewers on the edge of their seats, while his passion for talking about the sport he loved was matched by an all-encompassing knowledge gained through hours of painstaking research before every race.

In fact he's a throwback to another age who managed to survive and indeed prosper from the revolutions in motor racing. In his book he writes about his childhood and the influence that his father, British motorcycle champion Graham Walker, had on his career. Failing to match his father's achievements on the track, he made a successful career for himself in advertising which catapulted him to the top of his profession.

An offer from the BBC to take over the commentary seat for their F1 broadcasts was manna from heaven for Walker, and it wasn't long before the infamous 'Murrayisms' enlivened a sport which until then had been shrouded in a cloak of unfathomable technical jargon and mind-numbing statistics.

He also talks about the biggest changes in the sport over the last 50 years, in particular the safety issues which came to the fore after the tragic death of Ayrton Senna. His partnership with James Hunt behind the microphone is the subject of some hilarious anecdotes, while his views on drivers such as Damon Hill, Jacques Villeneuve, Eddie Irvine and David Coulthard make for fascinating reading.