Protection officers told The Sun they feel like they are being treated “like skivvies” as the couple have asked them to pick up groceries and coffee.
The team are reportedly running up huge bills on flights, cars, wages and overtime as they mount an around the clock watch on the couple.
Last week, a Royal Protection officer was seen buying food from a delicatessen close to Meghan and Harry’s £10million home.
Scotland Yard’s former Head of Royal Protection, Dai Davies told The Sun: “I would consider outside the remit of the close protection officers to be running errands and going shopping.
“Their priority is close protection and as such have to stick to them like glue.
“But you build up a relationship with the employer and use a common sense approach in these situations.”
Prince Harry and Meghan are thought to be guarded by a team of up to 15 trained close protection experts in Canada after the couple stepped back as senior members of the royal family.
A royal security source told The Sun: “While the guys are happy to be out there doing the jobs, there is a feeling they are carrying out menial tasks, like picking up takeaways and groceries.
“They are close protection officers - and should be sticking solely to close protection rather than running errands.
“It is dangerous for one thing, because if something were to happen it would not be good if one of them was away running an errand or picking up coffee.
“And they are the ones who would get it in the neck from their bosses if they were in the wrong place at the wrong time.”
One of the officers has also been spotted picking up order from fast food outlet Tim Hortons and coffee.
The local source told The Sun: “The bodyguards have a fleet of cars, which must have been hired locally – all Range Rovers, Land Rovers and SUVs.
“There are 10-15 burly blokes and most of them seem to be British.
“They are doing a very good and professional job but it is hard not to spot them in an isolated place like this."
Her Majesty acknowledge the couples request and after a series of talks at Sandringham she announced Prince Harry and Meghan will no longer use their royal titles and will also be ased to repay taxpayer's money to renovate their house.