Although this reply says to use “standard” wall switches, in fact, there are many different types that can be used. Quite a few community members preferred to get a “retractive” or “momentary” Dumb switch to use with inwall micros like the Fibaros. These are inexpensive, widely available, and come in many different Colours and finishes. And you never have to worry about the switch position, since the switch always returns to the neutral position after use.
I just mention them because not everyone would consider those a “standard“ wall switch, but they work very well. 
Varilight is a popular brand and Screwfix.com is a popular UK retailer, but there are many choices. Schneider also has a number of models, although they tend to cost a little more. Check the specifications as well: the Schneider usually support up to 16 A well many of the others only support 10 A. That’s not usually a problem with lighting, but it’s something to be aware of.
See the following discussion threads: ( The topic title is a clickable link)
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@anon36505037 has now done two complete houses with Fibaro kit and may be able to add more. Here’s one of his posts comparing different momentary switches. Remember that the switch itself is dumb, it’s the Fibaro inside the wall which adds the intelligence.
https://community.smartthings.com/t/hive-with-st-uk/68744/27