UK light switch lock covers

I have a few smart bulbs retrofitted around the house and, as you would, it is a challenge to stop people turning them off.
I have designed this blocking plates for standard UK light switches, that stops people from turning them off, yet still allowing access to push the switch when needed.
The plates come in 2 varieties, single that can be used for single and 2 for double gang switches and one for 3 gang switches. Due to large differences in dimensions of the 3 gang, it was impossible to design a single plate that would fit all.