A horrified resident dialled 999 when she witnessed a man masturbating in Plumstead Common.

The 27-year-old, who cannot be named for legal reasons, was walking down the stairs to the common, from Lakedale Road, at around 3.15pm yesterday afternoon (February 3).

She was on her way to pick up her daughter from school when she unwittingly stumbled across the lewd act, and is now issuing a warning to others to be vigilant.

The Kings Highway resident told News Shopper: “I walked down the stairs, it’s a shortcut, instead of going around the outside.

“When I walked down the stairs on the right hand side there’s houses, I saw a cat, I looked on the left and he was there.

“It was fully out. I’ve never seen that before in my life. Never seen that before.

“He had his phone in his hand while he was doing it, an iphone.

“He had his trousers on but the zip undone. He didn’t even look at me or anything, he was just continuing.”

The Metropolitan Police confirmed they were called to the park at 3.20pm following reports of ‘a man performing a sex act’ in a bush.

The eyewitness continued: “I shouted at him, he didn’t even say anything. He just continued to do what he was doing.

“I just started shouting and swearing, I said what are you doing, what the f***?

“He didn’t look at me he was just looking at his penis.”

MORE TOP STORIES She immediately dialled 999, and says as she turned to read the road sign to relay it to police the man disappeared.

The mum-of-two continued: “Then I called the police, even when I was talking to them he was still doing it.

“I gave them the details, I gave a description of him.

“He could have gone anywhere, it’s scary.”

She described the man as of Arabic appearance, in his 20s, and wearing blue jeans, a black hoody, jeans and a blue cap.

Near all-girls school Plumstead Manor, in Old Mill Road, she worries about youngsters coming across the obscene act.

She added: “I thank god my kids weren’t with me. I’m disgusted, when I was walking down a lady was walking down there and kids.

“Everyone walks down those stairs, it’s a shortcut.

"People just need to be careful, the kids should walk in pairs.”

A spokesman for the Met Police confirmed no one had been arrested.

The mother added: “It is scary. I’ve got kids myself, a four-year-old daughter and a five-year-old son.

"I used to play in those woods when I was a kid. I used to pick berries there.”

Anyone with any further information is asked to contact officers at Greenwich via 101.

Last year News Shopper reported a series a incidents where men were seen 'aggressively' masturbating, some fleeing holding their underpants. Read more below. 

Naked man spotted masturbating in New Eltham before fleeing with underpants in hand

Semi naked man spotted aggressively masturbating in a car in Orpington

Naked bald man seen aggressively masturbating and grunting in Grove Park