In most cases, other trades such as kitchen fitters, plumbers, plasterers, carpenters, builders ect will offer to make electrical changes or additions to a property without having any training, qualifications experience and insurance. They often say “it will work out cheaper or better if they do the work.”
As seen in the video, this is a potentially dangerous situation where single insulated cables or showing cables have not been connected properly together and left twisted, and there is a lack of earth continuity.
Don't get caught out using non-electrical trades to do electrical work who have no idea about electrical safety or good working practises they tend to only be interested in making sure the lights work. The homeowners have been put at risk, left out of pocket and have to arrange for the works to be put right.
If you are in doubt about your electrical installation. The best thing to do is to arrange an Electrical Installation Condition Report (EICR). This is a service we offer and prices are published on the website.