Bring your own tinfoil.
I dont know why you lot continue with this. GCHQ will continue to collect the data whether its illegal or not. They always have done, and always will.
They are the "Secret Service" Is that not a giveaway? They are not just allowed to hide what they do, they are required to. If you don't want them to know, then its a good idea to leave the electrons alone.
As my granny used to say: "The only way to keep a secret is not to tell anyone".