Open Source UK GPS Data (Score 5, Informative)

We have been collecting GPS positions at 10 second intervals since we began operations in London in 2004 (we're a courier company with a technology twist). We have collected 173 million positions on a 24/7 basis (growing by about 1 million per day) across our bicycle, motorbike, and van fleet. We have been donating to OpenStreetMap for years and have released our data for noncommercial use via a public API http://api.ecourier.co.uk/ under a CC license. Have fun!