Hi guys.we had an electrician today.all problem solved.it turned out to be faulty socket in old part of kitchen.Hi, the 'usual' culprit is water in an outside socket or light which is fed from the circuit. Or the central boiler with a knackered pump !
If the fault is a neutral to earth fault, you need an electrician ,with test kit.
Dave
Thanks to you all who tried to help me or someone who tried to take a **** of me.