Here is how works at a Port Talbot address, including the parts that decide the price. The cost drivers here are access and condition rather than parts. Deadline-aware scheduling is default, not a premium is the one that moves a quote most. It gets photographed if it will be hidden afterwards.
Photos of the CU and meter, or a 15-minute is the pivot point. Everything quoted after it follows from what the readings say, which is why the survey comes first at any SA12–SA13 address. In practice that means checking photos of the CU before anything is replaced. What matters for consumer unit upgrades for letting agents & property managers is the condition of this installation, not the average condition of installations generally.



