In an unusual move certain to heighten anger among suppliers, the demand also applies to goods that have already been supplied to the company.

Last month, however, the correlation was negative, a very unusual move and one highlighting greater weakness in the pound than might normally be expected.

The press was barred from listening in on the briefing to analysts and investors yesterday morning, a highly unusual move.

Less found his current position himself and recommends this approach to anyone looking to make even a slightly unusual move.

Manifesto, the corporate governance specialist, criticised the highly unusual move, which it said gave management an incentive to sell the company at any price.