[rikroots]

Probably the Treaty of Amsterdam - one of the EU's more entertaining reads

https://www.europarl.europa.eu/topics/treaty/pdf/amst-en.pdf

The UK Human Rights Act landed in 1998. Schedule 1 Part I Article 10 covers "freedom of expression"

https://www.legislation.gov.uk/ukpga/1998/42/schedule/1/part...

[M2Ys4U]

Even prior to the Human Rights Act the UK was bound by Article 10 of the EChHR, it just wasn't directly enforceable by UK courts (one first had to exhaust domestic legal challenges and then bring a case in Strasbourg at the ECtHR)