This is not the blog post I set out to write. The one I set out to write was about Flickr, about machine-tags, about noticings and about transport data feeds. I had it all mapped out in my head during one of those wide awake in the middle of the night and your mind's buzzing moments. But as I started to research the blog post that I had set out to write, it mutated.

So with the caveat that I'm well aware that I'm making a sweeping generalisation whilst simultaneously doing a large disservice to a lots of specialist UK data providers ... 

Until recently, if you wanted a source of geo data in the UK you had three choices.