The Royal Navy had/has loads of history of taxpayers helicopters and other aircraft being used private fly-ins, deliveries or questionable use. Delivering personal items and private parties... looking for houses to buy. Visiting schools. Golf course recces. Brewery runs. Wine wholesale sellers liaisons in Jersey.... you name it,its gone on.
Not just the Royal Navy...
RAF criticised for allowing Prince William to fly Chinook to Kate Middleton's house - Telegraph