Sure, this one’s easy. there are several different places to look.
- get a cover plate designed to hold a Phillips hue dimmer switch. You don’t have to use the dimmer switch on top, it’s just that there are a lot of these readily available right now. Iyoki make some that fit UK switch plates. (You can also surprisingly find them on Etsy, but I don’t know about UK sources for that option.)
In some cases you might have to remove the spinner knob from the existing switch to get it to fit, you’ll just have to check dimensions.
One nice thing about this category as many of them are designed to remove quickly to give you access to the existing switch underneath if needed.
Here is just one example of this type:
- baby guard. These are common in the US, but harder to find in the UK because many UK light switches already have a built-in lock feature for this reason. You can check to see if your existing dimmer switch does have a child guard feature, some do, some don’t. If yours doesn’t, look for a guard intended to cover an outlet instead. This is typically just a little plastic box that fits over the existing switch. These are usually opaque, I suppose to make them less attractive to young children. (Many of the outlet guards are designed over the outlet when a plug is in place, so they should be high enough for the spinner knob.)
- splashguard. This is commonly identical to the baby lock, except transparent and sold in a different department. Oh, and they will often say “weatherproof” in the description since they may be intended for outdoor use. Again, you’ll have to check the height dimensions or possibly remove the spinner knob.
- thermostat lockbox. Lots of people want to put a lock box over a thermostat to keep people from changing the settings. These are usually hard clear plastic so you can see the thermostat inside but they are intended to deter adults, not just children, so they are sturdier and usually more expensive than the previous categories. They will also have an actual keyed lock or a way to add a mini padlock. I think most people would prefer one of the three previous categories, but these are sometimes easier to find at the local High Street.
For your purposes, these also have the advantage of often being higher than the switch covers, so you should be able to find one where you don’t have to remove the spinner knob to get it to fit. Just check the dimensions carefully.
- Dementia Aids. There are switch cover boxes sold for homes where someone with dementia or Alzheimer’s keeps changing the light switches. These are typically a hard plastic with a keyed lock, transparent, and intended to deter an adult. So they are sort of a cross between a thermostat lockbox and a baby guard.
They tend to be more expensive than any of the other categories and can often only be found from specialty retailers. But they do exist, so I thought I would mention them.
I don’t know anything about this particular seller, I’m just showing it as an example of the product type.
So there you go. Five different types of products to look for, so hopefully you can find something suitable.