A RANGERS fan accused of murdering a rival Celtic supporter in a public house toilet yesterday told the Old Bailey a prosecution witness was responsible for the killing.

Joiner Brian Smart, 44, a father-of-one from Paisley, pointed the finger of guilt at Stephen Harper, who three weeks ago gave evidence for the Crown.

Giving his testimony yesterday, Mr Smart claimed that Mr Harper, 39, came out of the toilet and said he had just ''laid into'' victim Paul Cannon. Mr Smart said he was warned by Mr Harper to keep his mouth shut.

Mr Smart told the trial that Mr Cannon, 43, originally from County Wicklow, Eire, was drunk and falling over so he left him propped up against the toilet wall. He said Mr Cannon ''came down'' on him as he used the toilet at the Magnet Pub in Addlestone, Surrey so he helped him to his feet.

But after the Irishman collapsed again, he left him and went to order another drink at the bar.

The court has heard how Mr Cannon died from horrific internal injuries after being stamped on in the toilet of the Magnet in April last year.

It is claimed Mr Smart killed him after a long-running feud over ''conflicting football loyalties'' arising from their Old Firm rivalry. However, giving evidence, Mr Smart denied causing the injuries, and claimed Mr Cannon merely fell on him.

Mr Smart said soon afterwards Mr Harper, who has a history of mental problems, came out of the toilet. He said he asked Mr Harper, who was chewing an ice cube, what had happened and he replied: ''I just laid into him''.

Mr Smart, of Station Road, Addlestone, denies murder and manslaughter on April 17, 1998.

The trial continues.