Police and Westminster council have failed in a bid to ban the 65th in line to the throne from the borough after years of violence, threats, criminal damage and racist behaviour.
Rowan Nash Lascelles, 43, would simply ignore the proposed Criminal Behaviour Order and take his offending to other neighbourhoods, Deputy District Judge Olwen Davies ruled.
Lascelles, who is the son of The Hon. James Lascelles, the Queen's first cousin once removed, fled City of London Magistrates' Court minutes before the hearing and a warrant was issued for his arrest.
He is addicted to powerful synthetic marijuana 'Spice' and mixes with the users and dealers who congregate in Westminster, particularly around The Strand, the court was told.
The great-great-grandson of George VI has multiple convictions for racially-aggravated criminal offences and was once banned from Sainsbury's in The Strand for telling staff: 'Go back to where you come from. I'm going to kick you out of the country. You're not English.'
Scotland Yard had backed the application to ban him, with one officer, PC Zak Ali, telling the judge Lascelles was a 'burden on the Metropolitan Police'.
And Westminster's rough-sleeping co-ordinator, George Bossman, said Lascelles had 'always ended up losing his accommodation due to his inappropriate behaviour and has now exhausted all of his options'.
Mr Bossman said: 'It costs a lot of money to place him in a hotel, but there was constant anti-social behaviour and criminal damage. There have been frightening aggressive outbursts and racist behaviour and he has been engaging in the illicit use of substances and buying it in Westminster.'
Rowan Nash Lascelles, 65th in line to the British throne, would simply ignore the proposed Criminal Behaviour Order and take his offending to other neighbourhoods, Deputy District Judge Olwen Davies ruled
The court heard that his father, The Hon. James Lascelles, has provided him with hotel accommodation in Victoria.
Judge Davies dubbed him 'plainly a persistent offender, who leaves misery in his wake'.
Refusing the Criminal Behaviour Order application, Judge Davies ruled: 'An order will not deter him due to his entrenched criminality.
'He is either unable or unwilling to change and ignores the criminal law.
'An order excluding him from Westminster would simply be ignored. If he does not obey the law he will not obey a Criminal Behaviour Order and simply offend in other London boroughs and