Simon Cowell breaks his back after falling off his new electric trail bike

Cowell is regularly seen on bike rides with his family around his Malibu home. Silverman was spotted enjoying a cycle on Saturday before news of Simon's fall broke.

The mogul, who is worth £385million, started his health overhaul by buying two homes, each of them more a family residence than a bachelor pad.

The first was a huge house in the south-west London suburbs, which will in time replace his Holland Park pad in west London and is being fully refurbished.

He also bought the huge mansion in Malibu – where this weekend's accident took place – for £19million. It has already replaced his mansion in Beverly Hills.

The latter, familiar to many from being featured in the Judges Houses section of The X Factor, was due to sell for £18million this week.