Barbed wire fencing has been erected around Hampstead Heath ponds in an effort to deter trespassers amid a surge of swimmers seeking refuge from a 36C heatwave. The protected wildlife habitats, historically maintained for nesting ducks and swans, have been repeatedly invaded by individuals bypassing designated swimming areas.
Security guards hired by the council to manage crowds have reported escalating aggression and threats from those who disregard "NO SWIMMING" signs. The guards, who cannot issue fines, stated they are often outnumbered and face intimidation from the rule-breakers. "They often get aggressive and try to fight us," one guard told the Daily Mail. "We can't give out fines, we can just report it to our officer... But we need four or five officers to actually tackle it."
The incidents have intensified during recent heatwaves, including one in May and the current spell which saw temperatures exceed 35C. A video captured on Tuesday showed approximately 20 people swimming in the model boating pond, using water pumps as flotation devices. The guards observe crowds of up to 50 people, of all ages and genders, entering the ponds after 5 p.m.
According to security personnel, a common pattern involves a single individual entering the water, followed by dozens of others. While acknowledging that about 10% of visitors are respectful, they estimate that 90% disregard the rules. The guards have also noted that the pond invasions occurred previously, with a nest reportedly destroyed by swimmers last year.
Some individuals argue that booking systems and designated swimming areas are overly bureaucratic. One young woman described the booking system as a hindrance to enjoying public spaces, advocating for a first-come, first-served approach. She also expressed dissatisfaction with gendered swimming areas, noting that the men's pond appeared less crowded.
Environmental concerns have also been raised by residents. David Paul, a retired artist and fisherman, noted the potential damage to the underwater environment when the undisturbed sediment is stirred up, potentially releasing harmful blooms. He also recalled an instance last year where a duck's nest was sunk by swimmers.