This is the number plate holder and rear light. It's a side mounted job which attaches to the end of the swingarm. The back plate is made from an offcut of aluminium sheet left over from the seat pan. The mounting bracket is some flat mild steel bar with some sexy lightening holes drilled in it. I've positioned it so that a full sized numberplate will need to be offset a bit to clear the wheel, but a cheeky slightly smaller one will fit just right.

And here it is, minus the numberplate. I'll also need a reflector - I'll probably just use a cheap stick on one stuck to a corner of the numberplate.