OT: Regulations regarding transport trailers

Hello All,

Can someone help. I have recently purchased a single axle, braked vehicle
transport trailer which has been made from an old caravan chassis. I have
recently read that all trailers require a plate indicating the maximum axle
weight, date of manufacture etc etc! My trailer has no such plate. What
should I do? Can I just make my own plate, or is there some way of getting
one?

Any info would be appreciated.

Cheers
Robert