Hi connorhuggett, welcome to the forum
I am also a Civil Liberties activist, but I am not familiar with United Kingdom laws.
That said : In general, if you are using a VPN ( like SecureLine ), I recommend not to use any USA, UK or in your own country based servers.
Also switch regularly from VPN server, and/or use other ( free ) proxies like Tor as well.
Greetz, Red.