The Ystrad Mynach version of this job is shaped by the local housing: 1970s estates around Hengoed. On a 1930s semi you should expect us to flag: ring finals extended into the kitchen or a rear extension without checking the R1+R2; back-boiler removals leaving abandoned wiring in the airing cupboard; loft-conversion feeds spurred off the upstairs ring rather than a dedicated circuit. Most enquiries reaching us from Ystrad Mynach arrive after something has already been tried. Starting from measurements rather than the previous attempt saves time. Older installations around CF82 show this more often than newer ones.
Where the answer is to leave it alone for now, that is exactly what we will tell you. The schedule of results records it either way. If you are weighing up eicr — electrical safety checks on a 1930s semi at a Ystrad Mynach address, the useful starting point is the age and history of the wiring.



