Paul McBride QC, who has represented Celtic manager Neil Lennon in front of the SFA, claimed the governing body was now "the laughing stock of world football" and accused them of favouring Rangers after Ally McCoist, Madjid Bougherra and El-Hadji Diouf all escaped bans following the explosive March 2 Old Firm derby.

McCoist yesterday successfully appealed against a two-match ban after being charged with misconduct for clashing with Lennon - who was given a four-match suspension - after the Scottish Cup game at Celtic Park.

Bougherra and Diouf escaped with fines and a warning about their future conduct after facing the SFA's disciplinary committee to answer a case of "misconduct of a significantly serious nature".

But they were not handed any additional bans on top of their automatic one-match suspensions for the red cards they picked up in the game.

Smith dismissed McBride's reaction to the decisions.

Former Rangers striker Smith told BBC Scotland: "To say bias in favour of anybody, I don't think so. But it's hard to get that across. People have that mindset.

"I never saw any evidence of any bias whatsoever in almost three years."

Lennon returned to the dugout last night after McBride led a legal challenge which meant the four-match ban issued for the clash with McCoist could run concurrently with a prior four-match suspension, meaning the Bhoys boss was banished to the stand for a total of five games.

Smith insists the cases of the Celtic boss and the Rangers assistant manager were different.

He added: "The two instances are not like-for-like.

"Neil Lennon admitted guilt by not appealing against the ban. Ally McCoist did appeal, his case was heard and he won that case."

The Scottish FA announced tonight they are contemplating legal action against McBride.

A statement read: "Scottish FA chief executive Stewart Regan would like to make the following points:

"We note that Paul McBride does not act on behalf of or as a spokesman for Celtic FC, its manager, or anyone associated with the club.

"In making his unjustified and inflammatory remarks, Paul McBride appears to be acting as a self-publicist and not as a QC.

"Paul McBride's wild and inaccurate statements are defamatory and appear to be malicious.

"The Scottish FA is now considering, with the benefit of legal advice, whether to sue just Paul McBride for damages or whether to also sue other parties.

"A formal complaint is being made to the Faculty of Advocates with respect to the way in which Paul McBride has allowed himself to be held out as making comments to the media in his capacity as a QC.

"We are aware that many observers and members of the public would appreciate clarity on the decisions made at yesterday's meeting of the Disciplinary Committee. It would be inappropriate to comment publicly on committee decisions until the seven-day timeframe for any appeal has elapsed."