Scrap that, Poplar proxy still rubbish, port 119 connections to Cogent are fine, email connections to Cogent are fine and Bageley proxy connections are fine - Poplar proxy web connections are rubbish - I've started to see other sites suffering the same problem with the Poplar proxies as well now (3dgamers for one - 100k with Poplar - 370k with Bageley)
This needs to be fixed

There's no point in Poplar area users having 10 meg connections when the rubbish proxies can't even handle 3 mb