A BUILD up of heat caused a fire at a farm in Risley on Thursday morning.

Crews from Warrington and Birchwood fire stations attended Moss Side farm, on Silver Lane, shortly after 5.20am.

When they arrived they found the blaze involved plastic sheeting.

The police were informed in case any road closures were necessary, although none were carried out.

Crews left the scene at 7.33am and put the cause of the fire down to conducted heat.