Former Rangers' owner Sir David Murray's company has called for an investigation into how sensitive details of the club's tax affairs were leaked to the outside world.

Murray International Holdings said it had instructed lawyers to look into media reports of the case – both newspapers and on the internet – to decide if it warranted legal action.

A company spokesman said: "While MIH has at all times respected the privacy of the Tax Tribunal proceedings, a substantial quantity of confidential information relating to the case has become available for public consumption, stimulating considerable discussion and often ill-informed debate.

"This has been wholly inappropriate and outwith the fundamental principles of natural justice.

"We formally request the relevant authorities investigate how these sensitive details have been released so widely.

"We have instructed our lawyers to retrospectively review online and printed publications relating to the case to identify whether legal redress is appropriate or necessary."

He added: "We are satisfied the Tax Tribunal has now published its widely awaited decision and note the contents.

"We are pleased with the judgment, which leaves minimal tax liability and overwhelmingly supports the views collectively and consistently held by our advisers, legal counsel and MIH."

Charles Green, chief executive of Rangers, said: "I am sure all Rangers' fans will welcome a judgment has been reached on this case at last.

"That said, the judgment will not affect the operations of the club, nor the proposed flotation of the business as a public company.

"This case is historic and was a matter for The Rangers Football Club plc ('oldco'), which is in liquidation.

"As HMRC stated in June when it decided to vote against the proposed oldco CVA, no tax liabilities relating to 'oldco' would transfer across to the new company. HMRC has recently reaffirmed this position to the club's tax advisers, Deloitte.

"The Rangers Football Club Ltd is a company free of external debt.

"The judgment serves to further undermine the validity of the SPL Commission into the use of EBTs.

"As we have said all along, the SPL decision to press ahead with a commission was ill-timed and fundamentally misconceived."