"This switch looks fine internally, but the weatherproof housing is badly flawed. The first switch from Screwfix broke on the first occassion that I closed the weatherproof cover - at the bottom of the cover, there is a hard plastic tongue which is intended to latch into the base unit to provide a weatherproof seal, but the tongue broke off when I closed the cover. Screwfix replaced the switch without delay, but the replacement refused to close properly, so was definitely not weatherproof. I called Screwfix again and accepted a full credit for the switch, along with the 13 amp socket from the same manufacturer that I bought at the same time - see next review. I have used the credit to buy an MK switch and socket, and from past experience, I am sure that they will be satisfactory. The moral of the story is - 'Don't choose cheap items when safety is important'. Full marks to Screwfix for trying to help, but the product is definitely safe to use!"