What year

Well its probably been done before but have looked on the forums and cant seem to find what I need so hear goes, I have a S11a and don’t have an old reg plate for it, so need to get an age related number any one know a good site were I can find the year of manufacture from the vin plate and were is the best place to get a dating certificate from, thanks in advance.
Sprox

S11 don't have Vin no only chassis no's.I take it from what you've said you don't have a V5,so in which case you'll neede to contact DVLA

your chassis number will tell you how old it is

yu mite find the info here.

You could try Gaydon, if they can find it its gonna be £35.00 but they would be able to tell you the correct plate, if they can't they often don't charge

Heritage Certificate for your car traced with <b>chassis</b> number - Heritage Motor Centre Online Shop