The signs put up on the western side of the north London park read 'Cruising for sex? Homosexuality is legal. Use a hook up app like Grindr or Sniffies and get a room'.
Dogwalkers on Hampstead Heath are campaigning against public sex ("cruising") in a specific area of the park, arguing it's not a designated cruising ground. Gay activists are protesting to defend anonymous open-air sex as a "cultural right," holding demonstrations and claiming cruising has historical significance on the Heath.