Charlie Gilmour, the son of Pink Floyd guitarist David Gilmour, was jailed for 16 months on Friday for going on a drug-fueled rampage during a student fees protest in London.
Gilmour, 21, had admitted violent disorder. A court heard he had shouted "We're going to break all the laws" during last December's protest.
He was seen hanging from a Union Jack flag on the Cenotaph war memorial and leaping on to the bonnet of a Jaguar car which was traveling in a convoy carrying Prince Charles and his wife Camilla.
His defense team had disputed an allegation that he also threw a trash can at the car but the Press Association reported that Judge Nicholas Price told Kingston-upon-Thames Crown Court in southwest London he was satisfied Gilmour had in fact thrown the bin.
Gilmour was also accused of attacking the front window of a clothing store in Oxford Street and making off with the leg of a mannequin.
The court had heard the Cambridge University student had turned to drink and drugs after being rejected by his biological father, writer Heathcote Williams, and had taken LSD and valium in the hours leading up to the violence.