A man arrested over the attack on the Prince of Wales's convoy during an anti-student fees protest has been released on bail.
The 34-year-old was held on suspicion of violent disorder and criminal damage in connection with the incident in Regent Street in London's West End on December 9.
He attended a west London police station by prior appointment and was later bailed until June, Scotland Yard said.
A car carrying Charles and the Duchess of Cornwall was mobbed by demonstrators who had split from the main protest against higher university tuition fees.
Camilla was visibly distressed after being poked in the ribs with a stick through an open window in the distinctive Rolls-Royce Phantom VI as she and Charles travelled to the Royal Variety Performance at the London Palladium.
Meanwhile, police have charged another eight people over an earlier student protest which led to the storming of the building that houses Conservative Party headquarters. Two women, five men and a teenage boy are accused of aggravated trespass in connection with the demonstration at the Millbank complex in central London on November 10, Scotland Yard said.
The seven adults will appear on bail at City of Westminster Magistrates' Court on March 28.
They are: Belinda Edney, 21, of Fleming Gardens, Nottingham; Samuel Peppersharp, 23, of Alexandra Park, Scarborough, North Yorkshire; Lewis Bassett, 24, of Roseleigh Avenue, Nottingham; Paul Sheppard, 24, of Iffley Road, Oxford; India Harvey, 21, of Kingsnympton Park, Kingston, Surrey; Joseph Jones, 19, of Brownen Road, Bournemouth, Dorset; and Adam Mcleod, 19, of Well Street, Hackney, east London.
A 16-year-old boy, from Hornsey, north London, will appear on bail at West London Youth Court on March 8.
Hampshire student Edward Woollard, 18, was sentenced to 32 months in a young offenders institution in January for throwing a fire extinguisher from the roof of the Millbank complex during the protest.