Your solicitor is, shall we say, challenged when it comes to knowing road traffic contravention procedures.
You cannot make representations in your name; the authority may not consider reps from you; the CC is addressed other than to you, and so would the Order for Recovery, therefore you have no legal standing to submit a SD.
As per slapdash, who the hell is who in this saga?
Your company may submit a FoI request or you may do so on their behalf if you have written authorisation.
Stop anything to do with a SD until we and you know who's who and the registered keeper has the documents to hand.