Arsonists snuck into the old Barrhead High and set the building alight for the second time in just THREE days.

Four Scottish Fire and Rescue Service (SFRS) vehicles were called out to another deliberate blaze at the derelict property last Wednesday night.

Intruders initially sparked a blaze inside the property on Sunday, October 15.

The fire started last midweek is the latest in a series of incidents at the empty school this year, prompting calls for the building to be demolished as quickly as possible.

Police have confirmed they have held discussions with BAM Construction, which is overseeing the demolition process, to tighten security in a bid to prevent future incidents from taking place.

Sergeant Michael Morganthaler said: “We have been speaking to the people who are responsible for security at the old Barrhead High and measures have been increased following last week’s fires.

“However, I would like to highlight to the public the significant dangers present in that building.

“I’d like to make sure that anybody thinking about entering that site thinks very carefully about the health and safety risks they are exposing themselves to.”

East Renfrewshire Council has confirmed the building will be demolished at the start of the new year.

A spokeswoman for the local authority said: “It is disappointing that the old Barrhead High School has been targeted in this way and we would remind people that they could be putting lives at risk by entering the site.

“We have been in contact with the contractor to ensure that suitable and adequate security is in place to minimise the possibility of further break-ins and malicious damage.

“The building is currently being prepared for demolition and the project is scheduled for completion by early next year.”

An SFRS spokeswoman said: “The Scottish Fire and Rescue Service was alerted at 10.34pm on Wednesday, October 18 to reports of a fire within the former Barrhead High School building.

“Operations Control mobilised four appliances and firefighters used powerful hoses to tackle and extinguish the flames.

“Crews left the scene after ensuring the area was made safe.”