Dh thinks cooker was faulty and was probably hotter than it shoudl have been. teh electrician wont have checked this but it can be. even tho cooker appears destroyed. very important it is kept - also whatever is inside.
suggest you approach a lawyer for legal aid. laywer will comission expert report. you need to take photos of cooker, oven, inside oven and all damage now.
you may have a case against teh manufacturer of teh cooker. you might get back teh money for all teh damage so keep a note of everything
Does you mum knwo the fire investigation people at hamilton? they will be able to help and point you in teh right direction
Do you want to CAT me?