Rogue urban artist Banksy may have struck again after a picture in his style was spotted in Hendon.

The image, which depicts a boy marking the wall of a power station with the words “Last Graffiti Before Motorway”, can be seen at the A1 junction with the A406 North Circular Road.

Members of the Banksy Forum website, which follows the artist’s work, have expressed their excitement about the new piece and have already claimed it is an original.

One member, who calls himself zippy, said on Saturday: “I am buzzing, just come home and on way back saw a new stencilled piece. I just know its [sic] Banksy.

“I am grabbing my camera and going back out. The positioning of it is better than any I have seen.

“In my years of loving Banksy I have never stumbled across a piece, and to have one so near I feel honoured.”

He added: “It’s on a brick wall so hopefully won’t be stolen before I get back out.”

Pest Control, which is the handling service acting on behalf of Banksy, is looking into whether it is an original.

A spokeswoman said: “We answer enquiries and determine whether he was responsible for making a certain piece of artwork and issue paperwork if this is the case.

“Pest Control deals only with legitimate works of art and has no involvement with any kind of illegal activity.”

Simon Todd, from the online auction site artnet.com, said the painting can only be valued once it has been formally identified.

“In terms of valuing things like this, it is very difficult,” he added.

“It can be quite arbitrary what they will say is a Banksy and if they say it isn’t original then it isn’t worth anything.

“If it is a Banksy though, it could be worth as much as the previous artworks, which have sold for hundreds of thousands.”

Mr Todd said everyone who sees the graffiti work in their area will react differently.

“I think it would be a shame if the council come to paint over it,” he added.

“It depends on people’s reaction. There are always horrible oiky kids who will squirt a bit of paint on a wall, but it will be interesting to see what people think of a real bit of art.”

If you were surprised to see the 15ft artwork or can confirm it is an original, contact the newsdesk on timesnews@london.newsquest.co.uk