CAMPAIGNERS objecting to the construction of a bypass are taking their case to the UK Supreme Court.

The move will be the third court action by William Walton, chairman of pressure group RoadSense, who is bidding to stop Scottish Government plans for the £400 million Aberdeen Western Peripheral Route.

The 28-mile route was given the go-ahead by the Government in 2009 after a public inquiry.

Mr Walton is challenging the lawfulness of the decision to approve it.

Mr Walton said: "In 2005 [then Transport Minister] Tavish Scott announced a route which had not been subject to public consultation. We still believe this is a fundamental injustice."

A RoadSense spokesman backed the court action.

However, Transport Minister Keith Brown said further delays will only cost taxpayers more money. The Government has spent more than £1.1 million defending the action, while RoadSense, funded largely by donations, has spent around £300,000. Mr Walton hopes to fund the action through further donations.

Mr Brown said: "There has now been a parliamentary process, a public local inquiry and two comprehensive court verdicts giving the green light to the road."