Although the business paid the cost, the taxpayer funded the security for the Prince — an estimated £175,000 ($350,524) for protection officers' pay, plus costs of £80,000 for their travel.
MP Nigel Mills, a long-standing member of the House of Commons public accounts committee, said the scheme should be subject to a parliamentary investigation. "It's very unusual for a royal initiative to be set up in this way, as a company. I am concerned about the way this undeniably good scheme has been set up because it looks like a departure from the norm," he said.
"I think it is something the PAC should look at in the next Parliament."
Layla Moran, who has served on the committee, agreed. "We must do due diligence if there's a suggestion that proper processes have been bypassed because it's got the royal branding."
A Buckingham Palace spokesman said on behalf of the company: "The [2 per cent] clause was never exercised and has since been deleted."