They sent a copy of the invoice from aspect.co.uk. Says on there faulty RCBO replaced. Doesn't say why it failed. Bit strange really. I mean it could of been loose conductors in the terminals I suppose. Still. Odd that it didn't trip. He put that in writing. RCBO did not trip, which it should have if power was lost? It was the ring circuit for the kitchen. I think they should have called me. I would have come out immediately. It was a few months ago as well. Don't know why they left it so long to pursue the claim.