They shouldn’t be doing that they would be in breach of PECR the Privacy and Electronic Communications Regulations which sit alongside the Data Protection Act and from the 25 May the GDPR. If you have unsubscribed they will be in breach of GDPR after 25 May.
Whether you voted to leave the EU for racist reasons or to stick it to the Conservatives, you’re stuck in a fantasy 1950s. You’ll believe anything written on a bus, those who voted for Brexit voted for an undefined fantasy that will leave this country broken.
I manage my passwords with a web front end for online cloud access, browser plugins and cached Apps for Android and Apple devices. It means I can access my passwords anywhere in the world at any time. Other services mandate a clunky physical file that is shared between devices meaning you have multiple files to manage.