Sir Michael Gambon has handed his £1.5 million estate to his wife – but left nothing to his long-term mistress. The dad-of-three ‘Harry Potter’ actor – who died in September aged 82, with his wife Lady Anne Gambon and son Fergus at his bedside, following a bout of pneumonia – had a high-profile relationship with set designer Phillipa Hart, who was 25 years his junior, and with whom he had two teenage sons. His will was published on Tuesday (05.03.24) and, according to the Daily Mail, they showed almost his entire fortune had been bequeathed to Lady Anne. She is listed as an executor along with…