Gardens and outside spaces have always featured in Momentum’s work, with the charity having designed and constructed hospital play areas, gardens and a vegetable garden.
Author Jacqueline Wilson opened the garden.
Momentum director Bianca Effemey said: "Winning gold at Hampton Court is such a huge privilege. Having a very sick child is one of the most unimaginably hard things that a parent will ever have to go through. Outside spaces and gardens can provide the respite that families need to escape the daily clinical hospital environment. It means a great deal to us that our own peaceful Momentum Garden has won such a prestigious award."
In conjunction with Tale Valley Nursery in Devon, the Momentum Garden at Hampton Court, sponsored by Chartridge Developments features willow sculptures designed by sculptor Victoria Westaway, representing a Momentum family of two parents and their two children. The sculptures will be auctioned at a later date to raise funds for the charity.
Chris and Lorraine Birchall of Tale Valley Nursery in Devon, who won a gold medal for their Momentum garden design at Chelsea Flower Show last year.
Chris Birchall said: "After having the privilege of working with Momentum last year at Chelsea we are delighted to be working with them again this year at Hampton Court promoting such a worthwhile cause. It is a great honour once again to have won Gold."