Beko tumbledryer tripping mid way through cycle (DTLCE80121W)

My Beko tumbledryer (DTLCE80121W) cuts out mid way through each cycle, with no lights or anything. It’s on an extension lead (only the tumble dryer is – has been on an extension lead with other appliances for two years with no problems), and when I press the reset button on the extension lead it works again, but then cuts again after about 10/15 minutes. It seems to work fine when it’s on, i.e. it’s heating up, the motor is running, water is collecting in the tray etc. Thanks