The Prime Minister, Mr Blair, said that looking back on the episode when his son Euan was found drunk in Leicester Square "it was pretty hilarious".
Mr Blair also said, in an interview with the Mail on Sunday, that he was very worried at the time and that the incident when the teenager - then aged 16 - was discovered by police last year after celebrating the end of his GCSEs had robbed him of sleep.
"I was very worried at the time. But now looking back it was pretty hilarious," the Prime Minister told the newspaper.