Armstrong World Industries is understood to be reviewing its law firm panel following the announced merger of Clifford Chance and Rogers & Wells.
The US-based multinational manufacturer instructs Rogers & Wells. But an inside source says that the company is unhappy about the firm's link-up with Clifford Chance.
The news comes a week after The Lawyer revealed that British Midland had axed Clifford Chance from its line-up of firms because it was becoming a global firm.
The source says that Clifford Chance was instructed for the first time this month and that conflicts have already arisen, though those conflicts have now been resolved.
The review comes at a time when companies are beginning to question the need for a global firm on their panels.
Armstrong, which manufacturers ceilings, floors and insulation products, has a world-wide turnover of £3.5bn. The UK office co-ordinates legal services for Europe, Africa and the Middle East.
Pennsylvania-based Armstrong has 69 plants in 15 countries, with 30 per cent of its sales in markets outside the US.
Its Uxbridge-based deputy general counsel Mark Willis-Jones refused to comment.