In the words of The Smiths (we loosely paraphrase here:) Some towns modems are bigger than other towns modems. We think that's what Morrissey was singing, his cadence is a little hard to follow at times. Anyway, it seems the biggest broadband speeds in Britain are to be found in our ever-humble city. Yes, not only is London the all-conquering wi-fi capital of the world, but a survey for BBC News has revealed our......