Some London councils say they are still refusing to sign a ULEZ expansion agreement despite a looming deadline today.

Transport for London (TfL) wrote a letter warning councils that have vowed to defy the emissions zone's expansion, that it still has the power to go ahead with the installation of signs and enforcement cameras on the boroughs’ roads.

It comes after councils including Bexley, Bromley, Harrow and Hillingdon told Sadiq Khan they “strongly opposed” the plans, citing the “adverse effects” on residents, businesses and visitors.

Following TfL’s attempt to convince the councils to work together and formally sign the agreement by today (February 2), the councils have released a new statement showing they are not backing down from their stance.

The statement reads: “Bexley, Bromley, Harrow and Hillingdon councils will not sign the Section 8 agreement with TfL while legal advice is being taken.”

A TfL spokesperson clarified that while there is a deadline today for the agreement, this does not mean the transport body will immediately begin a forced implementation of additional cameras - this will instead come into force after August 29.

READ MORE: ULEZ scrappage scheme announced ahead of expansion – here is what it offers

However TfL has confirmed their letter explained that it has the legal powers to override the councils’ refusal, but they would prefer to have their consent.

By signing the agreement, the local authorities would have a say over the design and positioning of new cameras and signs.

News Shopper: TfL says that it will still be able to install cameras despite not receiving permissionTfL says that it will still be able to install cameras despite not receiving permission (Image: PA)

The councils previously said in a joint letter: “Until we have seen compelling evidence to the contrary, it remains our position that this scheme will not translate successfully to outer London and the negative impact to local households and economies will far outweigh the negligible air quality benefits.”

A TfL spokesperson said: “The Mayor has been clear that with 4,000 Londoners a year dying from toxic air, his decision to expand the ULEZ should be implemented with minimal delay.

“In doing so we are working closely and collaboratively with all boroughs concerned to install the infrastructure needed.”