> legally we're not allowed to do anything ourselves This isn't true. Avoid hyperbole when describing your laws. You can change fittings, switches, lights, li

> legally we're not allowed to do anything ourselves This isn't true. Avoid hyperbole when describing your laws. You can change fittings, switches, lights, like-for-like. You may even be able to extend a circuit. And anything that would require certification you can do but you cannot self-certify, so you have to pay a qualified electrician to check your work. As you have done. I won't disagree that even professionals can be lazy or incompetent but if they mess up, it's their insurance, their career on the line. If you did uncertified work on your home and it burned down yours and your neighbours' houses, who do you think the insurance companies are going after?