Charles Arthur: "The task is simply this: find out how much your local council is paying to the Ordnance Survey (OS), Britain’s mapping agency, for its mapping services. All it takes is a little FOIA request"

"If you can think of what you’d like to do with data from the Land Registry, Companies House or the Met Office, then you could be in line to be the first to benefit from it - and show the benefits of making more data free."