Great suggestion from G.DMT, wouldn't have immediately thought of that.
The route I would have entertained, because I love free stuff, would be to sign up a free (for 12 months, I think?) AWS account and create your own OpenVPN connection to bounce through it.
It is possible to specify no encryption on an OpenVPN tunnel, so in theory, would have all the benefits of a lower latency L2TP tunnel.
You'd need to make sure you establish over UDP, for best results, I guess.
AWS recently introduced the London hub, in addition to Ireland, Germany and a load of others. Worth a shot if nothing else?