Just done two speed tests, both on the Speedtest.net website. One was to London and the other was to Roubaix, France. Here are the results:
London:
Roubaix:
It shows that the London speed test is heavily in demand and therefore giving the wrong speed results! I'd use either of Paris or Roubaix as they seem more accurate...and knowing the French internet a much better system as well! The ping to the London one is also higher than the French one!
Would be interesting if people did both of them and to post their findings here. I find that during the day the London one gives a good result. Will be interesting to see everyone's results....