A mural of Art Attack star Neil Buchanan has appeared on the side of a homeowner's garage seemingly signed by street artist Banksy.

The 58-year-old former children's TV presenter was forced to deny he was the secretive artist after an online conspiracy theory went viral last week.

Former Art Attack and Finder's Keepers host Neil wrote: "Contrary to the recent media frenzy – I am honestly, hand on heart, NOT Banksy."

A stencil-style piece of graffiti art inspired by the bizarre rumour which swept the internet has now appeared on a driveway in Northampton.

Dad-of-three Allan Levy, 57, woke up on Tuesday morning to discover the image of Neil Buchanan's face plastered across his wall on Brick Kiln Lane.

Neil Buchanan
A 'Banksy' artwork of Neil Buchanan has appeared after a bizarre conspiracy theory spread that he was the secretive street artist

The picture shows Buchanan holding a paint spray can and unmasking himself as the world-renowned street artist, and includes the Banksy logo.

It is typical of Banksy's style – but so far the famous Bristol artist has not claimed responsibility for the work.

Allan, who is a photographer and multi-media artist, said he was delighted to discover the piece of art poking fun at the theory Buchanan was Banksy.

Neil Buchanan 'Banksy' artwork
The painting of the former children's TV host appeared on the side of a house in Northampton

He said: "I was blown away when I saw it. It's certainly a great piece of art and I love street art.

"It was obviously clever and well thought out, the stencilling work is extremely well done. I'd certainly like to think it was Banksy and it has been the talk of the town since.

"I'd recently cut back some plants that were hanging over onto the wall. I'm glad I did as at least the artist had a clear space to work with.

"It's really good, it's such a lovely piece – this is beyond anything I could have dreamed of.

Neil Buchanan 'Banksy' artwork
Last week, Neil was forced to come out and deny he was the artist following a Twitter conspiracy

"The wall itself is on my driveway and it is shared with a neighbour because it's part of an old row of garages.

"I phoned the neighbour and asked him what he thought.

"He didn't really want people using it as a canvas but if you live in Northampton, a white wall like that it is a bit of a blank canvas for the world."

Banksy stencil
The artwork appeared to have been 'signed' with Banky's distinctive stencil

As soon as Allan came across the artwork he contacted the website pestcontroloffice.com, which verifies Banksy's artwork.

He added: "They said it would be on Instagram if he had done it, but that can take weeks. This only just happened two days ago.

"They aren't really 100 per cent sure it's not him so we're kind of waiting and seeing. I'm not going to do anything with it.

"I think street art belongs exactly where it was put. I'm a photographer myself and I very much appreciate it as an artist.

"It belongs where it was made and it should stay exactly there. I'm just proud to have it there whether it turns out to be a genuine Banksy or not.

"But I can't help but have the attitude that I now have a Banksy in my collection – I'm very proud of it."

Neil Buchanan 'Banksy' artwork
Fortunately, homeowner Allan Levy was thrilled to have a potential Banksy artwork on the side of his house

Buchanan, from Liverpool, hosted Art Attack on ITV from 1990 until 2007 and was known for using the show to create large-scale artworks.

Rumours of his alter-ego started when one web user claimed Banksy artworks had sprung up in places where Buchanan's former band Marseille had played gigs.

Northampton Council says the work is on private property and so they won't be trying to ascertain if the work is authentic or not.