We tremble on the verge of greatness today, as the first of the parties – Labour – sets out its manifesto. I’ll comment on it after I’ve read it. In the meantime, a look at how modern politics is conducted, in practice. In this election, one of the Tories’ main tools is a ‘consumer categorisation’ package called Mosaic, developed by the data management company Experian. They are one of the big credit ratings firms, and are also behind that software that spookily knows who you are and where you live when you type in your postcode.

