George Knights, 41, from Feltham in west London, was arrested two days after the BBC TV presenter was shot dead outside her Fulham home on 26 April.

His arrest followed a 40-minute car chase, during which police and pedestrians came under fire, and a four-hour siege outside his home.

On Wednesday Mr Knights appeared at a pre-trial hearing at the Old Bailey, facing charges including attempted murder, possessing explosives and several firearm charges.

He asked the Recorder of London, Judge Michael Hyam, if he could speak to one of the detectives involved in his case.

"It is to do with the Dando inquiry," he said. "It is completely separate."

Mr Knights was defending himself having sacked his defence team. However, he said he intended to hire another firm of solicitors.

The hearing was adjourned until 10 September.