How can the campaign be won?

For south London councils to stop paying the levy, a change of legislation will have to be made in Parliament.

There are two routes that could allow the necessary change to take place.

With Government support, an amendment stopping the tax for south London councils can be attached to another related bill coming through parliament in the coming months.

Or an MP can set out legislation to change the law through a Private Members Bill (PMB).

During each parliamentary session 20 backbench MPs, chosen through a ballot, have the right to introduce a bill, that if approved by parliament, will become law.