Laurence Llewelyn-Bowen was among thousands of visitors

Thousands attended the picnic and treasure hunt in Kensington Gardens to raise money for a new �40,000 play area at Great Ormond Street Hospital.

Designer Laurence Llewelyn-Bowen, who was dressed as a pirate, re-created Captain Hook's galleon in the central London park.

Peter Pan creator JM Barrie gave the copyright to the play to the hospital.

The writer lived on the edge of the Kensington Gardens and was walking through the park when he met the family who inspired him to create Peter Pan 100 years ago.

The Tinker Bell Play Area will be built in the hospital's new Medical Daycare Centre which is under construction.

Llewellyn-Bowen said: "Three quarters of the hospital, which is now over 150 years old, is in desperate need of redevelopment and it is vital that we do all we can to keep this national institution at the forefront of paediatric healthcare, for generations to come."

The celebrations ended at 1700 BST on Saturday.