A man masturbated on a bench while small children ran around a nearby playground, Sutton police said.

Following the Monday, April 27 incident at 2.10pm, patrols have been stepped up in Poulters Park area.

A spokesman for the police said there were three or four women with small children in the play area at the time.

The suspect is described as white, aged in his mid 30s, of thin build with brown hair, a stubbly beard and of unkempt appearance. 

He was wearing dark tracksuit bottoms and a dark hooded top which he kept over his head at all times. 

After masturbating the suspect walked off in the direction of the clubhouse.

Those with information are asked to contact Sutton Police Station on 101 or Crimestoppers anonymously on 0800 555 111.