Not really a fan of the side-Mount plate myself - think it’s more of a US-thing. I’ve found some likely options for a regular tail tidy though -I’ll probably go the
@ChopperCharles route, but without hacking off any of the OEM undertray (sacrilege in my eyes! 0

)
I should be able to lash one of these options to the existing mount, once the plastic bit is removed (remember, our plates are a lot bigger over here - even my ‘not-quite-legal’ one!!) Then got to decide about the reg light. One of the options you’ll see has a light built in, or I could get a separate one, or even the ‘screw lights’ (a la
@Schu ). I think I’m more inclined to forgo it all together tho - blank it off and leave the wire under the seat. It not a legal requirement over here apparently (although a rearward-facing reflector on the centre-line of the bike is), and I very rarely ride in the dark.
Ben