In July 2026, the Supreme Court handed down judgment in Saxon Woods Investments Limited v Francesco Costa [2026] UKSC 21, addressing important issues of company law, including whether an individual director can "go it alone" and subvert the collective will of the board if they genuinely believe that pursuing an alternative strategy is in the best interests of the company.
The Court's clear answer to this question was that a director covertly pursuing a strategy inconsistent with the collective will of the board will – however well-intentioned (and indeed superior) it may be – constitute a breach of the director's duty to promote the success of the company under section 172 of the Companies Act 2006 ("s.172").
Whilst on the face of it this conclusion appears unsurprising, the Supreme Court's findings did overturn the Court of Appeal's reasoning (whilst nevertheless upholding their order). The Court of Appeal had centred its analysis of the s.172 breach on a finding that Mr Costa acted dishonestly. The Supreme Court, adopting a broader analytical route, focused instead on the requirement for good faith more generally, albeit recognising that "the dishonesty question may form part of that wider enquiry".
In this landmark judgment, the Supreme Court has established that the test for assessing a breach of the s.172 duty encompasses both subjective and objective elements. The Court will not critique a director's subjective commercial judgement as to the best route to promote a company's success. Nevertheless, the subjective genuineness of the director's belief in their conduct provides no defence where the means employed to implement that belief are, objectively, disloyal to the company. Consequently, the Supreme Court has established a clear legal precedent for Courts objectively to assess whether a director's conduct in pursuit of that belief meets the standard of good faith and loyalty owed to the company as a fiduciary. This represents a complete reversal of the High Court's first instance judgment that the test was purely subjective.