Former CEO Don O’Sullivan is bringing a claim for unfair dismissal and whistleblowing detriment against Battersea Power Station Development Company and four senior Malaysian executives.

O’Sullivan joined Battersea in June 2024 after 21 years at Galliard Homes.

He was dismissed in May 2025 amid claims he raised whistleblowing concerns about his employer, a Malaysian-owned development company.

He alleges that he was dismissed following charges of gross misconduct after raising concerns of serious financial misreporting, which were acknowledged by the Chair of the Holding company.

Since he was suspended, a number of employees have also lost their jobs or been suspended. O’Sullivan and various employees have the support of the GMB union in relation to these claims.

Battersea Power Station Development Limited is a wholly owned subsidiary of BPS Holding, a Jersey registered company owned 40% by Sime Darby; 40% by SP Setia Berhad and 20% by the Employees Provident Fund (the national pension fund of Malysia).

O’Sullivan’s case is that the effect of the financial misreporting has been to flatter the balance sheet of BPS Holdings.

After O’Sullivan reported his whistleblowing concerns in November 2024, he was excluded from the business.

Concerns identified by O’Sullivan were discussed at a Board meeting in London of both the Development Company and BPS Holdings on 16 December 2024.  O’Sullivan contends he was excluded the next day by two of the executives who were the subject of his disclosures, before subsequently being suspended on 24 December 2024.

The case is ongoing in the London South Employment Tribunal and has been listed for final hearing in 2029.

O’Sullivan is represented by John Hayes of Constantine Law and Stefan Brochwicz-Lewinski of Nine Chambers in Manchester in relation to his claims.

Hayes said: “Don O’Sullivan’s claim will possibilly be one of London’s highest profile and most valuable whistleblowing claim because it involves one of London’s most respected developers taking on a case against an iconic London development, owned ultimately by the Malaysian state.”