This is a petition to compel all organizations using non-geographic numbers (e.g. 0845, 087* prefixes) to also publicize an equivalent geographic number (e.g. 01* / 02* prefixes) where they can be reached (and which can usually be called more cheaply than an 0845 / 087* number).
The petition can be found http://petitions.pm.gov.uk/saynoto0870/
Please have a look and sign up if you're interested.