THREE councils have united in an unprecedented appeal to motorists to preserve a historic cart bridge and keep a key route open.

Leading members of North Yorkshire County, Hambleton District and Sowerby Parish councils said they had been astonished to discover large concrete blocks installed to prevent vehicles wider than two metres hitting grade II listed Blakey Bridge, in Sowerby, were being regularly moved.

It is believed drivers with powerful vehicles, such as tractors, are behind the incidents, which have resulted in further damage.

The narrow structure, which been closed numerous times in recent years after being hit by vehicles, including a 52-seat National Express coach, has had barriers at either end since last year, following residents and traders expressing anger at facing detours while the late 18th Century bridge was repaired.

The width restriction was implemented under a temporary traffic regulation order and is enforceable by the police.

County councillor Don Mackenzie, executive member for highways, said work was under way to find a permanent solution for traffic usage of the bridge, but if the barriers continue to be moved, the council may consider closing the bridge until more permanent measures can be put in place.

Hambleton District Council leader Councillor Mark Robson said he would be pressing his county colleagues to find a suitable lasting solution.

He said: "When it is closed it has a significant impact on those travelling to York and Sowerby and to the auction mart."

Sowerby Parish Council chairman Councillor Bill Austin said the actions of a few selfish people were creating mayhem for villagers.

He added: "The last thing we want is the road closed permanently, that would be a disaster."