Should the claim in negligence be struck out under CPR 3.4(2)(a)?
This point did not need to be determined as the claimant formally withdrew the claim in negligence before the end of the hearing.
Does Jameel apply to the GDPR?
Yes, the Jameel jurisdiction can be applied to data protection claims. Vidal-Hall v Google  QB 1003 and Higinbotham v Teekhungam & Anor  EWHC 1880 (QB) followed.
Do the de minimis and Jameel principles apply to the GDPR?
Yes. There is nothing distinct in the wording of Article 82(1) of the GDPR as to negate the continued application of Jameel or de minimis principles. This conclusion is consistent with the application of the Regulation in other jurisdictions.
Should the claim be struck out or summary judgment granted?
By a very narrow margin the whole claim did not fall to be struck out, but all claims save for the GDPR claim should be struck out.
The claims in misuse of private information, breach of confidence and breach of Article 8 ECHR should accordingly be struck out. The claim in negligence was formally withdrawn during the hearing by the claimant. They would not materially change the overall picture presented by the GDPR claim and were likely to obstruct the just disposal of proceedings by taking up a disproportionate and unreasonable amount of court time and costs.
There was no basis for the claim to have been issued in the High Court. The presentation and processing of the case to date in this forum constituted a form of procedural abuse by the claimant. The case has all the hallmarks of a Small Track Claim that should have been issued in the County Court and so allocated. Whether the claimant is entitled to purely nominal or instead extremely low damages should be determined in the Small Claims Track of the County Court.