An influential investor in UK buyout firm Terra Firma has voiced fears about backing the firm’s plan to inject more than £100m (€114m) into music publishing company EMI Group before a high-profile legal dispute with lender Citigroup is resolved.

An investor in one of the funds which backed the original £4.5bn buyout of the company in August 2007, told Financial News this morning: "It would be hard to tell if we should invest more money in the company unless we are well informed about the likely outcome of the legal case."