He placed it on the King’s head firmly, before giving it a twist in an attempt to keep it on.
But after the twist failed to work he lifted the crown up again, before having another go at securing it in position.
After his second attempt the crown tipped forwards on the King’s head.
Mr Welby then tilted it to the side before he was happy to remove his hands from the crown, leaning forward and carefully inspecting it before eventually retreating.
A little later, as the Queen was seen adjusting her hair around her face as her crown was placed on her head.
Prince Louis grabbed everyone’s attention again as he joined his siblings and parents at Westminster Abbey for his grandfather’s coronation.