Queen Elizabeth and the rest of the British royal family have more than 700 aides working for them. The employees have strict rules to follow - just like the family they serve.

But, among these rules, there is one many find "inconvenient" and "ineffective." An unearthed documentary reveals the royal aides can't use a vacuum to clean the floors.

The documentary features several former royal employees, including chefs, footmen and butlers, according to the Daily Express. They said they could only sweep the floors because the Queen mustn't ever hear the noise of a vacuum.

The documentary's narrator said the sound of the vacuum "offends" Elizabeth and the rest of the royals', too. The former royal aides said that the noise causes "disruption" to those working inside the palace. 

The sound, reportedly, resonates loudly inside the vast rooms. So, cleaners sweep the floors only - even carpets despite the more "laborious" and "less effective" work.

Aside from cleaners the documentary says royal butlers lay out clothes. As for the footmen, they carry breakfast trays early in the morning.

Former royal servant Peter Russell revealed his thoughts about being an aide to the Queen and her relatives. He said the royals are "divided" about seeing their staff.

Russell, who worked for the family between 1954 and 1968, said the royals wanted their aides in the palace but not in their personal quarters. He explained that they want their aides because the royals can't "manage" on their own.

The documentary says the "best servants" are neither seen nor heard. They demand the "most professional servants" and the kind that would choose to "die" rather than make a mistake.

Former press secretary to the Queen Dickie Arbiter talked recently about the difficulties of working with and for the royal family, according to Global News. He claimed that working any longer than five years would have burned him out.

Arbiter, who was spokesman for both Buckingham Palace and Windsor Castle, said the nature of working for the royals was "intense." He said it could add up over time - causing many staff to leave.

Despite this, he emphasized that moving on from working for the royals was a "natural progression."