My company does (standard) plates and we need two things, proof of the registration and entitlement to get the plates and proof of ID for the person ordering the plates.
You’ll need to get a copy of the log book from motability. The fines for cutting corners are scary even for a first time and are usually quickly followed by an audit of every plate made recently (and recently varies) so a single confirmed unlawfully made plate can easily put a company out of business (especially if they have done it before during that audit period)
"Man is born in freedom, but he soon becomes a slave, in cages of convention, from the cradle, to the grave."