My son, Geoffrey, was the first male Down's Syndrome to gain the Duke of Edinburgh Gold Award.

His final expedition was to camp overnight on the slopes of Mount Snowdon, along with two girls as his helpers. The next morning was his 21st birthday and they surprised him by producing a bottle of champagne and a birthday cake.

My husband and I were both invited to St James' Palace where Geoffrey was presented to the Duke of Edinburgh, who gave him his certificate. A truly memorable occasion.