Response from F & A Electrical
Thank you for your feedback, Sophie. When I attended, the RCD was tripping due to low insulation resistance on a circuit that was not clearly identified at the consumer unit and marked with a “(?)”, indicating unknown routing. I spent around an hour testing to correctly isolate the affected circuit and rule out others. The kitchen extension sockets were checked and found to be spurred from elsewhere, with no accessible fault without intrusive investigation. My advice was given based on the test results and with safety as the priority. I’m pleased the issue was ultimately resolved.