Yep,the earlier bikes had a slightly differant number plate light too.It had just a push on cover that was prone to falling off.Most were replaced with the newer type cover with a screw in the side.
My bikes an 02 model on a '52' plate.

There is a simple option that costs nothing and takes only a few minutes. Unscrew the black part of the number plate holder, attach the number plate to the remaining section.

That's what i've done and it looks much better.

Yeh, but you still have all the ugly metal bracket attached to the underside of the exhaust, when this is removed it transforms the back end of the bike.

I still have the stainless bracket (original) with the number plate mounted directly on it and the light modified as shown , I think this is better than some of the brackets I have seen for mounting under the rear light as they look pretty flimsy.

Also , if you remove the original mount you are left with the mounting studs protruding from the standard silencer , not pretty :(

If you have a termi silencer fitted you are left with open threaded inserts , or I suppose you could put bolts in them , either way is a dirt / corrosion trap.

The kit comes with dome nuts to put onto the studs - didn't know what they were for as I have the Termis but if the standard can has studs then that makes sence. I put the bolts back into the inserts... don't think it will be more of a dirt trap than the original bracketry :D

Did over a hundred miles today to Popham and back and it hasn't fallen off yet so I guess my fears of the single bolt being a problem are unfounded as yet.

Talking of which - anyone see/own the 999 with no rear lamp unit that was at Popham? It had a tiny tiny plate and an LED tail/brake light sandwhiched between the seat cowl & exhaust. Very neat but I wondered whether da Law took a dim view...