Hotpoint WM55 won't unlock?

Hi there, I popped the machine on last night and soon after my electrics tripped. I reset them and the washer carried on going. Unfortunately, at the end of the cycle the "door locked" light stayed on and I haven't been able to open the door since. I've tried unplugging it and running it on an extra cycle but this hasn't made any difference. Any help would be really appreciated! Thank you xx