Not very bright am I (hence the question on lighting!). I've now looked briefly at the Manual and so far as I can see it gives quite detailed information for headlamps but little or nothing for other lamps other than suggesting 'E' mark for colour of lenses.
Interesting (for me) to note side reflectors are required and parking brake must operate on both wheels of an axle.
As I shan't be doing the MSVA I'm just left wondering how its standards might apply generally.
Thanks again Bigdogs for the link to the Manual.