His GP referred him to the hospital for the treatment and Mr Blair had the treatment at about 1900 BST on Thursday.
I haven't got the up to date figures but in May 2004 - Average total wait 150 days for treatment for a slipped disc - obviously it has improved now thanks to nu-labour if he was seen immediately!
Mr Blair's wife Cherie denied Mr Blair had a slipped disc when asked about his health at a law awards meeting.
But Downing Street explained Mrs Blair had been told her husband had a "prolapsed disc" and did not realise it was the same as a slipped disc.
An alternative explanation is that Cherie just lies so often she has forgotten what truth is....