https://www.rideapart.com/news/54254...fication-2021/
...actually all road vehicles not just bikes. This is a proposal only but it's worth keeping an eye on.
I've already written to my MP (for what it's worth) explaining about fender extenders, huggers, adjustable levers, flyscreens and handguards that my bike has had fitted which has made my bike safer.
Another article I saw about this said that only mods made by the bike manufacturer would be allowed.
I stress this is a proposal only.