And his brother Harry had a tiny Velcro compartment sewn into his wedding uniform to keep the ring safe.

Russell Kashket, who was responsible for making 2,000 royal wedding uniforms, has spoken for the first time since a confidentiality agreement lapsed after the nuptials.

More than 350 members of the Kashket military tailoring staff in north Lonmdon made the outfits, which also included the drum majors' gold state coats, Household Cavalry Mounted Regiment dress, and uniforms for all five Footguards regiments.

"It was difficult to make it all without anyone knowing what it was for," Mr Kashket said. "We had to use a pseudonym."

Prince William met with Mr Kashket several times to discuss the design.

"He was very concerned about the heat because he knew all the cameras and lights would make it very hot in the Abbey," Mr Kashket said. "We worked together to get the look he wanted while using material to absorb the heat and make sure he didn't pass out in front of two billion people across the world.

"When we designed the outfits, we sat and had coffee and biscuits with Catherine and William. She was lovely and gave more input than people realise.

"We made the outfits from scratch. I was at the palace all the time. I was virtually living there - at one stage I was there every day of the week."

The garments were made by hand by staff led by Mr Kashket's brother, director and tailor Marlon, using couture hand-stitch techniques to embroider gold wires into the collars and cuffs.

Read more: http://www.telegraph.co.uk/news/uknews/royal-wedding/prince-william/8497665/Prince-William-had-wedding-uniform-made-from-heat-absorbing-material-over-fears-he-would-faint.html.