"The claimant, J, carried on a property development business through a company which, for all practical purposes, was his corporate embodiment. In 1988, J, acting on behalf of the company, instructed the defendant firm of solicitors, which from time to time acted for him personally, to serve a notice exercising the company's option to purchase certain land. The solictors duly served the notice, but not in a manner which was incapable of challenge by the vendor. After the vendor disputed the validity of the notice, the company instructed the solicitors to issue proceedings against him for specific performance. Although the court eventually granted such an order, it was not until April 1992 that the land was conveyed to the company. By that time, the company had suffered substantial loss because of the cost of the proceedings, the company's inability to recover damages or costs from the vendor (who had no assets), the collapse of the property market and high interest charges. In 1991 the company brought proceedings for professional negligence against the solicitors, and the latter were informed that J intended to bring a personal claim against them. In fact, in part because of his limited financial resources, J had brought no such claim by December 1992 when the company's proceedings against the solicitors were settled on payment of the substantial part of the sum claimed. In the settlement agreement, J gave an undertaking he would limit to a specified sum the amount of any claim made by him personally against the solicitors by reason of losses suffered through loss of income, dividends or capital in respect of his position as a shareholder of the company. It was expressly stated that that undertaking did not limit any other of J's rights against the solicitors. In 1993, after obtaining full legal aid, J brought an action against the solicitors for breach of duty, alleging that he had retained the solicitors to act for him personally as well as for the company in the exercise of the option, that they had been negligent in the manner in which they had exercised the option and that they had also been negligent in advice given to him personally on the likely outcome and duration of the proceedings against the vendor. J sought to recover, inter alia, the cost of personal borrowings to fund his own outgoings and those of his various businesses, the diminution in value of his pension and majority shareholding in the company, the loss of a portion of his shareholding in the company which had been transferred to a lender as security for a loan, an additional tax liability, general damages for mental distress and anxiety and aggravated damages. Over the next four and a half years the parties pleaded and re-pleaded their respective cases. In December 1997, shortly after the trial date had been set, the solicitors intimated for the first time that they intended to apply to strike out the action as an abuse of the process of the court, contending that the action could and should have been brought at the same time as the company's action. On the hearing of that application, the judge held that the solicitors were stopped by convention from contending that the action was an abuse. He also held, on determination of preliminary issues, that the solicitors had owed J a duty of care and that the heads of damages claimed were not irrecoverable. On the solicitors' appeal, the Court of Appeal agreed with the judge's decision on duty of care and, with one exception, with his decision on the pleaded heads of damages. However, it reversed the judge's finding on estoppel by convention and concluded that the proceedings were an abuse of process, holding that J could have brought his action at the same time as the company's proceedings and that he should therefore have done so. Accordingly, the court struck out the proceedings, and J appealed to the House of Lords. The solicitors cross-appealed from the court's ruling on the heads of damages, contending, in respect of some of them, that the alleged damage had been suffered by the company, not by J."