It is well known that being in the royal family comes with various rules of what can and cannot be done in public.

There appears to be several unwritten ways of doing things – from not posing for selfies, giving out hugs and wearing nail polish, however, the Princess of Wales has confirmed one strict instruction that all royals must abide by.

During a chat with children at this year’s Chelsea Flower show, Kate revealed one thing she is not allowed to provide the public with as a souvenir – despite it being a relatively simple request, writes The Mirror.

Kate and the kids looked around the Royal Entomological Society’s garden and some of the youngsters asked the princess to sign her name on their drawings. During a chat with children at this year’s Chelsea Flower show, Kate revealed one thing she is not allowed to provide the public with as a souvenir – despite it being a relatively simple request, writes The Mirror.

Kate and the kids looked around the Royal Entomological Society’s garden and some of the youngsters asked the princess to sign her name on their drawings.

But according to The Telegraph, she told them that she wasn’t allowed to, she said: “My name’s Catherine. I’m not allowed to write my signature, it’s just one of those rules.”

However, instead she drew some sketches for them – including one of a flower, another of a tree and one of a pond surrounded by some plants. Later during the event, Kate and the children sat down to enjoy picnic time where she was quizzed by the youngsters about royal life, and she said: “You have to work hard”.

However, one rule that the royals seemed to have overlooked since the Queen’s passing is saying no to selfies – and in fact, they seem to be embracing it. With most well-wishers turning up to royal events with their phones in hand – the likes of William and Kate have been seen posing with members of the public and smiling for photos.

Although a ban on royals posing for selfies was not part of official protocol, several members of ‘the Firm’ had previously revealed their dislike of the photos.