Errr... DCBL? Surely you mean DCB Legal, two separate legal entities. DCBL (Direct Collection Bailiffs Ltd) are powerless debt collectors who, as a third party to any alleged contract breached by the driver, can only spout scary rubbish in the hope that the recipient is low-hanging fruit on the gullible tree and will simply pay up out of ignorance and fear.
DCB Legal, on the other hand, are firm of incompetent wannabe legals who suffer from intellectual malnourishment. No doubt they are very successful, thanks to the gullible tree being so ripe with low-hanging fruit, but as long as you are aware that they are simply a firm of bulk litigators who rely on precisely the same reasons as their sister company, DCBL, that the majority of the general public are so poorly educated about the civil legal procedure, they can afford to throw away the claim application fees in many tens of thousands of claims every year. A loss leader, if you like.
I have yet to test it, but I am confident that any low value claim issued by DCB Legal will be discontinued as long as it is defended, irrespective of what is actually in the defence. I honestly believe that if you simply entered a nursery rhyme as your defence, assuming an administrative judge didn't actually read it and strike the defence out under CPR 16.5, it would still be discontinued in due course by DCB Legal.
The 'Claude' analysis is far too confident on “withdrawal in 7–14 days / 90–95% chance of closure”. Treat that as speculation, not prediction.
DCB Legal will never 'withdraw' based my LoC template response or any other for that matter. If you receive an LoC from DCB Legal, you WILL eventually receive a claim from them too. It is a sad sate of affairs that the courts do not take PAPDC breaches more seriously in small claims. That doesn't mean you shouldn't respond to an LoC with what I suggest. It is your right to request the information and it puts the claimant to task.
The strange point here is that I don't really believe that DCB Legal are simply 'acting' on behalf of their client. I believe that they are issuing claims on behalf of their clients in a scattergun approach, knowing that there are enough low-hanging fruit out there to very comfortably offset any losses. Without actual sagas, it is difficult to give any precise numbers, but DCB Legal alone, issue claims in the hundreds of thousands every year. The vast majority of those result in either the defendant simply paying or, in most cases, going to default judgment because the defendant buries their head in the sand or screws up the process.