For most of us, the prospect of meeting the Queen would be an honour and a privilege, and the chances are you'd be pretty nervous, and want to be on your best behaviour.
One photographer has recalled the one time he was working with the Queen, and wanted to make her feel at ease - like he does with all his clients - by telling a few jokes.
David Bailey was working with Her Majesty back in 2014, and just like with every other job, he wanted to help her feel as comfortable as possible.
