Owners and landlords across SA12–SA13 ask about this in roughly equal numbers, for slightly different reasons. If you have had conflicting advice, it is usually because someone quoted without checking NICEIC certificate, photo evidence. Two electricians looking at the same readings tend to agree. You will get the plain version, not the technical one, unless you ask.
We work to the current edition of BS 7671 and note where an older installation departs from it and why that matters. Paperwork is delivered in is the part worth confirming rather than assuming. Searching "consumer unit upgrades for cafés & restaurants Port Talbot" from a Port Talbot address usually means you want a straight answer before you want a salesperson.



