Sir David Jason has been pictured on set flanked by two security guards after a “credible threat” was made against the actor.
The ‘Only Fools And Horses’ legend is being guarded round the clock following the threat from an unknown individual.
It is not known why they have targeted the veteran actor.
The 77-year-old was spotted arriving on set to film the new series of ‘Still Open All Hours’ yesterday, escorted by two minders.
BBC bosses have also put up a cordon after the film crew were informed that his safety was at risk.
An on-set source told the Sun: “Production and security have been told there has been talk of a real threat. No one is taking any chances.
Sir David, who plays grocer Granville in ‘Still Open All Hours’, is filming in Doncaster, South Yorks, where the sitcom is set.
It is the sequel to the classic comedy ‘Open All Hours’, which he starred in alongside comic legend Ronnie Barker.
A spokeswoman for the BBC said: “We wouldn’t comment on security matters.”