The royal family are making millions from the NHS through the monarchy’s property empire. King Charles ’ 750-year-old asset portfolio is billing Guy’s and St Thomas’ NHS Foundation Trust £829,000 ($1.7 million) each year to rent a central London warehouse.

The Duchy of Lancaster signed the 15-year lease last year after the NHS trust said it needed help storing a new fleet of electric vehicles to tackle ambulance waiting times. The revelations form part of a joint investigation by the Sunday Times and Channel 4′s Dispatches that exposed how the monarchy earns money from contracts with public bodies. It has sparked a backlash, with some criticising the monarchy for lack of transparency over its finances.

.