So the battle lines are drawn. Sir Paul McCartney and Lady McCartney have both instructed high-flying and highly-paid divorce lawyers and if nothing is done to stop a descent into all-out war it may well prove to be an expensive exercise for both parties, no matter how well-heeled they are. The signs are not good, given the preliminary skirmishes that have taken place in the pages of the tabloid press. The McCartney's marriage problems have surfaced at the same time as other high-profile and highly publicised cases, the latest being that of Beverley Charman, who recovered some ?£48 million to the disgust of her husband, an insurance magnate. Mr Charman threatens to appeal the decision, no doubt running up more lawyers? fees in the process. .