Rangers at Hampstead Heath have installed new “no swimming” signs at the Model Boating Pond after some visitors reportedly ignored an existing ban. Multiple reports describe crowds during hot weather splashing in the water and engaging in activities at the pond, including swimming and other disruptive behaviour. The pond is designated as a safe environment for birds, and officials say the presence and actions of swimmers can interfere with wildlife there. The reports also allege that people were seen throwing items and behaving in ways that increase disturbance around the bird habitat. In response, rangers are moving to reinforce the rules in place, using visible signage aimed at discouraging further swimming. The issue is framed as part of a broader attempt to protect the pond’s bird population while managing visitor behaviour during peak heatwave conditions.