While the plumber was doing a job under the sink, the power breaker went off. I reset but kept tripping. I asked the plumber if this is related to what he is doing but he stated that is nothing do with him and he left.
So I rang Ralf, he was booked out for the day he said, but, alongside he walked me through 'the basic elimination troubleshooting' he mentioned that the problem could be caused by the moisture around the area. I checked under the sink and surely enough it was all damp, including the power point to the dishwasher right next to the hot water pipe the plumber was working on. I wiped it dry and switch the breaker back on, viola - power restored!
He is someone who is sincerely happy to help. A rare quality to find these days. Thank you!!