I visited a Highstreet ground floor building which has plans to be refurbished from a restaurant to a bathroom showroom. The electrical installation has been carried out in 2021 using twin & earth PVC sheathed cables. Because of the Covid pandemic the restaurant owners never opened and the electrical installation is not fully complete with the final fix of the wiring accessories still required. There is no electrical installation certificate. (Final circuits have all been wired into distribution boards). There is suspended plasterboard ceiling throughout.

The new owners are planning to refurbish the restaurant to a bathroom showroom with the intention to utilise the existing twin and earth PVC wiring and get an electrical installation certificate.

Question: Is twin and earth PVC sheathed cable suitable? Their electrician has told them he will not be able to provide them with an electrical installation certificate because cables need to be LSF type without giving them a reason why.