It's not a "summons". No crime or offence has been committed. It is simply a matter of contract law, a civil matter.
The details about the breaches of the BPA Code of Practice (CoP) are not really relevant, at this stage. The main thrust of the defence, for now, will be to get the claim struck out. The PoC are woefully inadequate and the point of the Draft Order that goes with the defence is to get the claimant to provide further, detailed PoC so that the defendant can make proper defence.
The Draft Order and the defence have been created with assistance from a long serving District Judge. There is a very long template defence available that has been doing the rounds for quite a few years. However, most judges do not like the defence as it is a very long boilerplate and most don't even bother reading it.
To date, not a single claimant who has been served the order has managed to comply with it and the claims have either been discontinued or struck out. The bulk litigators are renown for being lazy and greedy when overloading the court system with their poorly pleaded claims. Unfortunately, the vast majority of claims issued end up being default judgments. Here, at least, no one simply gives in.