If instead of downloading the files they took the info out in the form of neural network trained on the files and able to reproduce the information, that would be just fair use, 100 pound.
The fair use concept applies to any copyrighted material, I suppose.
BTW, maybe OpenAI can build on this their defence line. If they prove in court that the materials they got from Apple have never been used for design of products, and OpenAI only collected some linguistic statistics from the docs (as we know, training LLM is concepfually no different from calculating word frequencies), which does not violate copyrights. As for possible similafities in pfoducts to the Apple design, that's just a coincedence, developers can come to equal solutions when solving equal problenms. Equipped with modern AI assistants they quickly re-discover approaches others have discovered.
this would be some crazy landmark ruling opening the door to IP clean rooming of every IP, which means companies will no longer file IPs and keep it secret to delaying the inevitable