Mystifying!
Why is the Graun making sure other people do their paperwork?
A golf resort owned by US presidential candidate Donald Trump failed to register with the UK Information Commissioner's Office, the nation's privacy watchdog. The Grauniad reports that The Trump International Golf Club Scotland should have registered with the Office as it stores records on visitors and members and operates …
Using CCTV does require registration but a lot people think that storing basic customer details needs ICO registration, it often doesn't. See https://ico.org.uk/for-organisations/register/self-assessment/
Everyone has to comply with the Act even if registration is not required.