Isn't this almost exactly the use-case for a VPN: one well-defined snooping adversary? If one _assumes_ that the VPN provider doesn't lie (or at the very least is independently audited) and has a server beyond your jurisdiction then isn't moving the root of trust away from your un-trustworthy ISP the right thing to do?

If you have the right skills, it's not hard to set up Squid or your choice of other proxy software in the EU (eg outside the UK), and direct your browsing traffic over it.

Latency from the UK to (say) Germany or the Netherlands isn't too bad either.