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Carrying round handcuffs legal in UK:
https://www.gov.uk/government/publications/use-of-handcuffs-by-security-personnel/the-sias-view-on-the-use-of-handcuffs
"There is no law in the UK that prevents civilians carrying handcuffs. SIA licensed security operatives have no legal powers over and above other civilians. Anyone who does carry handcuffs should be aware that their use could constitute a crime, unless they can show that using them was reasonable and proportionate in the circumstances."
Look up where anyone lives in uk even police:
https://www.192.com/
Use Tor Browser totally legal uk browse web anonymously sends thru 3 relays layer encryption removed each relay sites see exit relay ip address isp cant see websites you access.
https://www.torproject.org/
Also access tor only sites 56 characters then .onion in tor browser. Even browsing illegal websites can claim doing so for "research/educational purposes" as long as you dont do anything illegal like buy drugs. List of some tor sites:
https://dark.fail
Use monero untracable cryptocurrency feather monero wallet:
https://featherwallet.org/
Tails os search youtube infosec bytes chat on tails setup xmpp chat off the record messaging over tor gchq cant track also view documentations on tails website how to setup persistence storage https://tails.net/