A motorists’ campaign group used “dirty tactics” in an effort to “manipulate the outcome” of public consultation on plans to expand the Ultra-Low Emission Zone, according to a London MP.

Janet Daby told the Local Democracy Reporting Service that she was aware of a “nationwide campaign” orchestrated by FairFuel UK, which calls itself “the real voice of the UK’s 37 million drivers”, that urged members to give negative feedback on TfL’s public consultation which ran from May to July.

The group, which receives funding from the Road Haulage Association and Logistics UK, opposes the mayor of London’s plan to expand the £12.50 daily charge to cover all of London and has called it a “cash grabbing” attempt.

According to FairFuel UK’s website, more than 5,000 of its members responded to the consultation using a pre-filled in template.

Howard Cox, the group’s leader and co-founder, tweeted that thousands of motorists across the UK, including people in Scotland and Northern Ireland, had responded calling for the London-wide plans to be scrapped.

He said: “FairFuel UK asked supporters to put their feelings about the ULEZ expansion to TfL. Over 5,000 in a matter of hours showed their opposition to this cash grabbing anti driver administration in London. This is not dirty tricks; this is democracy representing honesty not idealism.”

Howard Cox has been accused of being a “climate denier” over social media posts in which he questions the impact of man-made emissions on climate change.

Janet Daby MP said it was “scandalous” that a group with “vested interests” attempted to “to undermine the integrity of this consultation and consign more Londoners to a lifetime of health issues”.

A spokesperson for the mayor of London said that he and TfL were aware of the campaign by FairFuel UK and that all consultation responses, including their origin, will be detailed in the final report which will “inform the mayor’s decision”.

The mayor’s spokesperson said: “Air pollution is a matter of life and death. Around 4,000 Londoners die every year as a direct result of toxic air, and the majority of these deaths are in outer London where a higher proportion of older people who are more vulnerable to the impacts of air pollution live. This is why TfL and the Mayor consulted on expanding the ULEZ to reduce this toxic air.  An estimated five million more Londoners living in outer London are expected to benefit if the ULEZ is expanded London-wide.”

Sadiq Khan has previously said that he would not press ahead with plans to expand the ULEZ if the public “overwhelmingly” rejected them during the consultation.

Nick Rogers, transport spokesperson for the GLA Conservatives, said he hopes the mayor “will listen to the legitimate concerns raised in the consultation and abandon these proposals”.

He added: “The mayor asked people to tell him what they thought of his ULEZ expansion, and the people have spoken. This cost of living charge will punish Londoners who cannot afford to upgrade their car, while having a negligible effect on air quality.”

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