You say fuse? Do you mean circuit breaker, Or is it the rcd that trips out? Dont just switch them off. UNplug every thing on the circuit. Plug things back in one at a time. Start with fridge freezer, if that is one of the items. ( a faulty defost cct will give the effect you say) If after the time it usually trips, all ok, Plug next item in. etc when it trips, its the last appliance plugged in.
BE CAREFUL. what is the total power consumption of all the appliances you are plugging in. Are you using extensions to plug more in.
IF it trips without anything connected, do you have a shaver socket connected in the house. If you have a shaver socket, could be that, OR you have faulty wiring/socket, and need to get it seen to before you have a fire.
Sheepdog, March 2011