This should be interesting

The BBC report that:

'Councils in England should publish annual parking-charge accounts if they want to prove they are not being used as a "cash cow", MPs have said.

The Transport Committee warned it was "neither acceptable nor legal" to use fines to increase revenue.

Councils made a surplus of hundreds of millions of pounds each year, it added.

The MPs urged ministers to freeze charges, currently capped at £130 in London and £70 outside. Councils said money raised went back into services.

Committee chairman, Labour MP Louise Ellman, said: "There is a deep-rooted public perception that parking enforcement is used as a cash cow, so it's essential that local authorities apply stringent transparency."'

If any accounts are published, then I doubt that they will be transparent. Many local councils use parking fines as a form of transgression tax that doesn't show up as an increase in local taxation.