It seems like UK is only doing this to comply with the UN court order and paying off local officials to still keep their base there while ignoring the harm caused to local natives of the island.
They refused to allow natives to get involved in the talks when the draft was negotiated, and now again refused to allow them to participate when the final version is being written. Typical colonialist behavior.
Use a password manager. And create a passphrase type password for it so it's easier to remember. Then you will have a unique password for everything, while only needing to remember one of them. And since you will use it daily, it's impossible to forget.