People are being warned to stay away from the "extremely dangerous" B4069 Lyneham Banks, which is currently closed to all vehicles and pedestrians due to a significant landslip on the road.

The landslip has broken up the road surface and it is still moving.

Pictures emerged earlier this month of daredevils using the ripped up B-road near Swindon as a makeshift skatepark.

Wiltshire Council says it is completely "inaccessible and impassable" for all motor vehicles and bicycles, while anyone who breaks through the fences to access the site on foot is putting themselves in danger of serious harm.

The authority added those accessing the site who are in breach of the traffic order so could be prosecuted.

The council is continuing to assess the site, but it is currently unable to carry out any work on the road as it is too dangerous to use any heavy machinery.

It is also installing permanent signage to inform road users of the official diversion route, which follows the A3102 and the A4.

These signs should be in place by Friday, March 25 at the latest.

On nearby single-laned Clack Hill in Bradenstoke, which is being used by a significant number of motor vehicles and is unsuitable for this traffic, the council has implemented a 7.5t weight limit and signage to advise drivers of ‘no through road’.

It is monitoring this situation and may take further steps to close Clack Hill at its junction with the B4069, depending on the effectiveness of the weight limit.

Should Clack Hill need to be closed, additional measures will be needed to manage any inappropriate displacement of traffic on other local routes.

'Extremely dangerous'

Councillor Dr Mark McClelland, cabinet member for transport, said: “The B4069 at Lyneham Banks is extremely dangerous, and people should not try to access it either in a vehicle or on foot.

“We have installed fencing and signage on site, but some people are choosing to ignore this and access the road. I want to make it clear that this is a very dangerous thing to do. 

"The land is still slipping, and anyone who accesses the site on foot could easily trip on the uneven ground or get caught in a more serious landslide."

Cllr McClelland added: “We are currently studying the results of initial geotechnical investigations and surveys to establish the cause of the landslip and to establish the next steps."

For more information about the closure and the project, click here.