Which London park was transformed into the Pleasure Gardens for the Festival of Britain in 1951?

Battersea Park is a 200-acre (83-hectare) green space at Battersea in the London Borough of Wandsworth in London. It is situated on the south bank of the River Thames opposite Chelsea and was opened in 1858. The park occupies marshland reclaimed from the Thames and land formerly used for market gardens.

In 1951 the northern parts of the park were transformed into the "Pleasure Gardens" as part of the Festival of Britain celebrations. As well as a new water-garden and fountains, new features included a "Tree-Walk", which consisted of a series of raised wooden walkways linked by tree house-like platforms suspended between the branches of a number of trees.

Popular attractions included the Guinness Clock, designed by Jan Le Witt and George Him, and the Far Tottering and Oyster Creek Branch Railway.