Unfortunately I don't know anybody, but I would like to find somebody too somewhere in Europe, not necessarly in UK. Could anywhere in central Europe (Germany, Austria, Switzerland, France,...). I used Hava and Slingbox in the past and I agree with you: Hava is way better!!!
By the way ... I can host a Hava for you in Canada (Toronto) if interested and if you can do the same thing for me in your location! Pending on where you live!!!