Get a router supporting DD-WRT and add custom route configurations to put all non VoD / Gaming traffic or anything requiring all of your bandwidth through a VPN like Vyper or something. That sufficiently covers most browsing / text communications. TBH I wouldn't bet that the security services don't have the power to snoop into encrypted / VPN connections on our national infrastructure anyway, but why would you care as long as you're not a terrorist or kiddie fiddler? You just want to prevent Theresa May and her bullshit short sighted policies from snooping on you for no justified / legal reason (like they probably already have been, anyway).