As London becomes the bright shining center of the European tech scene, it's only natural that the city would like to maintain its place at the top of the pile. That's why mayor Boris Johnson is pledging that London will roll out a 5G network across the city by 2020. It's part of a long-term infrastructure investment plan that'll see connectivity given equal prominence to more conventional resources like transport, energy and water. At the same time, broadband speeds for each home in the capital will be made public alongside data from the networks in order to find communication blackspots that require additional work. Of course, given that 5G as a standard has yet to be defined, it'll be interesting to see if the mayor can make good on his promise -- unlike the one about turning London into a giant WiFi hotspot by 2012.