Balfour Beatty started work on the £25m scheme in April 2015.

British Transport Police are appealing for witnesses after the rampage on Saturday night.

The vandals caused extensive damage to vehicles, construction machinery and partly-constructed buildings.

Inspector Lindsay Clarkson said: “The station was broken into last night and extensive damage was caused to vehicles, machinery and the buildings in the station. Windows were also smashed and graffiti daubed all over.

“BTP takes criminal damage on the rail network extremely seriously.

“It is nothing more than selfish vandalism that makes people fearful of their surroundings and costs the railway industry thousands of pounds to clean up.

“Unfortunately the costs associated with the clear up and fixing the damage caused is ultimately covered by the fare-paying passenger, which is not acceptable

“I would like to appeal to anyone with any information about this incident to come forward and contact us on Freefone 0800 40 50 40 or text 61016 quoting reference 577 of 11/6.

“I am certain that someone out there may know something that would help us catch the person or people responsible, and I would very much like to hear from them.

“Any information provided will be treated in the strictest of confidence.”