Thanks guys. I agree they are a fun purchase and also have the practical use of disguising the age of the car.
Thanks for the price estimates. They are around what I was thinking £500 - £600 given what I paid DVLA for it originally.
B10 RCF is 'Beaten' followed by my initials which I now think would also suit the Lexus model. Its spare as it was on my third car, a Porsche 944 S2 now sold.