The legal cost of the bust-up between the executors of the late Zaha Hadid’s will has hit £3.5m, the firm’s latest accounts reveal.

The long-running row became public more than two years ago and centred on who could be in control of the business.

Hadid’s long-term collaborator Patrik Schumacher (pictured) settled his dispute with the three other executors of the architect’s will out of court last year. He had wanted the power of veto over the firm’s board of trustees.

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