Hi Helen,
I have to say I am not at all clear about the alleged circumstances which have led up to this claim and why you think that, possibly, your computer might have been hacked.
If the defendant submits an incomplete defence form then, ordinarily, the court clerks would return it and ask for the extra page. However I think you are suggesting that the defendant will submit the form in full to the court and include a counterclaim alleging this breach of data, but withhold a page from you. If that is so, then they will be breach of the pre-action protocol and the court will not be impressed by this. Anyway, the case remains live due to the counterclaim, and all that needs to happen later is that the main (your) claim can be withdrawn at the case management stage if you so choose.
As for what the data breach might look like, it's hard to say since I have so few facts about any of this. Normally, assuming this is a claim under the Data Protection Act, the IPEC can't deal with the issue, so the matter would probably be passed to the
Media and Communications List of the High Court. Without knowing the detailed nature of the counterclaim it's not really possible to comment further. Here's the guide to the workings of the King's Bench Division, of which the MAC list is a part:
King's Bench Guide
Since this now some distance away from a straightforward issue, you might be advised to get some preliminary legal advice from a specialist solicitor. You can find one via the
Law Society website. Just choose Media IT and Intellectual Property as the area of law, and select your own part of the country, and see what results you get. You should initially seek a short (say 20-30 minute) free consultation probably on the phone or zoom etc. Then, depending on what you are told at this interview, you can decide how to proceed. It is not worth running up large legal bills if ultimately you want to drop the claim before the hearing.