Parking campaigners from the London borough of Barnet have won the quashing of the local council's decision to dramatically increase parking charges in April 2011.
The judge rejected arguments put forward by Barnet council lawyers that it had powers under section 45 of the 1984 Act to raise a surplus from parking charges for transport functions.
There were no parking charges in David Attfield's quiet residential road, who brought the lead case, until the controlled parking zone (CPZ) was first introduced in 2001 to prevent tube commuters parking in local streets.
The cost of a permit for a first car was initially £20 and visitor vouchers cost 35p each.
The charges were increased in 2006.
In 2011 that they leapt for a first car from £40 to £100.
Visitors' vouchers increased from £1 to £4 - among the highest CPZ charges in London.
London Councils has said that there was "no evidence" to justify claims that councils run parking enforcement with the objective of raising revenue, after it was revealed that £125 million of revenue had been made by five councils in the past year.
London Councils said: "Despite frequent allegations to the contrary, local councils do not run parking regulations or parking enforcement with the objective of raising revenue.
"The allegation has been formally considered on a number of occasions, including previously by the Transport Select Committee, which found no evidence to support the allegation.
"Several dogged campaigners have also spent considerable time and energy looking for the ‘smoking gun’ of evidence to justify this allegation, again without success".
Five London boroughs raised more than £125 million in parking charges and fines last year, according to a new study on revenues.
Westminster topped the unofficial table by making £37.1 million, whilst all of the top earners were in central London.
The figures, compiled by London Councils, were presented to the transport select committee which is holding an investigation into whether council parking revenues — and particularly fines — are excessive.
A group of campaigners are trying to encourage local councils to open their staff car parks on weekends to boost trade for local shops. Almost two thirds of those questioned by the Federation of Small Businesses say a lack of parking is harming trade. Robyn Dwyer has the story.