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| Version 4 | Version 5 |
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| ULEZ: Watchdog criticises mayor over data transparency | ULEZ: Watchdog criticises mayor over data transparency |
| (30 days later) | |
| The UK Statistics Authority said Sadiq Khan's claim was "not supported by publicly available data" | The UK Statistics Authority said Sadiq Khan's claim was "not supported by publicly available data" |
| The UK Statistics Authority (UKSA) says Sadiq Khan's claim that 90% of cars in outer London meet Ultra Low Emission Zone (ULEZ) standards was not supported by publicly available data at the time. | The UK Statistics Authority (UKSA) says Sadiq Khan's claim that 90% of cars in outer London meet Ultra Low Emission Zone (ULEZ) standards was not supported by publicly available data at the time. |
| Data was released this month after a complaint was made to the watchdog. | Data was released this month after a complaint was made to the watchdog. |
| The mayor's office admitted he misspoke in March when he said nine in 10 households complied. | The mayor's office admitted he misspoke in March when he said nine in 10 households complied. |
| City Hall's claim that 90% of cars seen driving in outer London complied with ULEZ standards was backed by the UKSA. | City Hall's claim that 90% of cars seen driving in outer London complied with ULEZ standards was backed by the UKSA. |
| From 29 August, the most polluting vehicles within Greater London must pay a £12.50 daily charge or a £180 fine. | From 29 August, the most polluting vehicles within Greater London must pay a £12.50 daily charge or a £180 fine. |
| The ULEZ expansion is subject to a judicial review next month. | The ULEZ expansion is subject to a judicial review next month. |
| The limited Transport for London (TfL) data shows the daily average total number of ULEZ-compliant cars detected in outer London in November 2022 stands at 90%. | The limited Transport for London (TfL) data shows the daily average total number of ULEZ-compliant cars detected in outer London in November 2022 stands at 90%. |
| A separate freedom of information request by the BBC to TfL showed one in six cars registered in outer London did not meet ULEZ standards last year, based on figures from the Society of Motor Manufacturers and Traders. | A separate freedom of information request by the BBC to TfL showed one in six cars registered in outer London did not meet ULEZ standards last year, based on figures from the Society of Motor Manufacturers and Traders. |
| The BBC has repeatedly requested the complete data behind the 90% claim from the mayor's office, including the number of vehicles captured on camera. | The BBC has repeatedly requested the complete data behind the 90% claim from the mayor's office, including the number of vehicles captured on camera. |
| The ULEZ is due to be expanded in August | The ULEZ is due to be expanded in August |
| The official statistics watchdog called on the mayor to provide more details to back up the claim and said it was part of a pattern where the mayor's agency TfL made public claims without publishing supporting evidence. | The official statistics watchdog called on the mayor to provide more details to back up the claim and said it was part of a pattern where the mayor's agency TfL made public claims without publishing supporting evidence. |
| The Office for Statistics Regulation (OSR), the independent regulatory arm of the UK Statistics Authority, looked at what Mr Khan has said about ULEZ after a complaint from Liberal Democrat MP for Twickenham Munira Wilson in April. | The Office for Statistics Regulation (OSR), the independent regulatory arm of the UK Statistics Authority, looked at what Mr Khan has said about ULEZ after a complaint from Liberal Democrat MP for Twickenham Munira Wilson in April. |
| She said Mr Khan's claim about how few households would be hit by ULEZ was "misleading." | She said Mr Khan's claim about how few households would be hit by ULEZ was "misleading." |
| TfL said at the time that nine out of 10 cars seen on its cameras "driving in outer London on an average day" did comply with ULEZ standards. | TfL said at the time that nine out of 10 cars seen on its cameras "driving in outer London on an average day" did comply with ULEZ standards. |
| However, Ms Wilson said this was not evidence about the number of households affected. | However, Ms Wilson said this was not evidence about the number of households affected. |
| Impact of mayor’s ULEZ expansion questioned | Impact of mayor’s ULEZ expansion questioned |
| ULEZ expansion: Contested claims examined | ULEZ expansion: Contested claims examined |
| In his letter to Ms Wilson, UKSA chairman Sir Robert Chote said: "We are satisfied that data collected by TfL at the time supports the mayor's claim that nine in 10 cars seen driving in outer London now meet ULEZ standards. | In his letter to Ms Wilson, UKSA chairman Sir Robert Chote said: "We are satisfied that data collected by TfL at the time supports the mayor's claim that nine in 10 cars seen driving in outer London now meet ULEZ standards. |
| "However, data on households in outer London who have a car that meet ULEZ emissions standards are not available. | "However, data on households in outer London who have a car that meet ULEZ emissions standards are not available. |
| "The statement made by the mayor relating to households in outer London is therefore not supported by publicly available data. | "The statement made by the mayor relating to households in outer London is therefore not supported by publicly available data. |
| "The data underlying the mayor's claim on cars driving in outer London were not available to the general public at the time, either from the mayor's office or from TfL. | "The data underlying the mayor's claim on cars driving in outer London were not available to the general public at the time, either from the mayor's office or from TfL. |
| "Users requesting clarification were provided with additional information, but that too was not made available on an equal basis to the general public." | "Users requesting clarification were provided with additional information, but that too was not made available on an equal basis to the general public." |
| Transport for London claims most cars driven in London are ULEZ compliant | Transport for London claims most cars driven in London are ULEZ compliant |
| Sir Robert said that this was "inconsistent" with "principles of intelligent transparency" and the Code of Practice for Statistics to which the mayor and TfL voluntarily subscribe. | Sir Robert said that this was "inconsistent" with "principles of intelligent transparency" and the Code of Practice for Statistics to which the mayor and TfL voluntarily subscribe. |
| "This case is one of several examples raised with us in which TfL has made statements or issued press releases based on unpublished TfL data or where data quoted are not provided with sufficient context," he said. | "This case is one of several examples raised with us in which TfL has made statements or issued press releases based on unpublished TfL data or where data quoted are not provided with sufficient context," he said. |
| "This prevents interested members of the public from being able to verify the figures, which can undermine trust in the organisations producing the analysis and their other outputs. | "This prevents interested members of the public from being able to verify the figures, which can undermine trust in the organisations producing the analysis and their other outputs. |
| "While some additional information has now been published, I would urge the mayor and TfL to make this material fully accessible to support understanding on what is a topic of high public interest." | "While some additional information has now been published, I would urge the mayor and TfL to make this material fully accessible to support understanding on what is a topic of high public interest." |
| A spokesperson for Sadiq Khan said: "City Hall welcomes confirmation that the OSR is content with the accuracy of the statement that nine out of 10 cars seen driving on an average day in outer London are ULEZ compliant. | A spokesperson for Sadiq Khan said: "City Hall welcomes confirmation that the OSR is content with the accuracy of the statement that nine out of 10 cars seen driving on an average day in outer London are ULEZ compliant. |
| "We note that further background explaining the data should have been provided at the time." | "We note that further background explaining the data should have been provided at the time." |
| Ms Wilson said the mayor "has serious questions to answer". | Ms Wilson said the mayor "has serious questions to answer". |
| She said: "The case for delaying this scheme is now overwhelming. Not even the mayor knows how many households in outer London have non-compliant cars. | She said: "The case for delaying this scheme is now overwhelming. Not even the mayor knows how many households in outer London have non-compliant cars. |
| "We need far more openness from City Hall if the public is going to buy into this scheme." | "We need far more openness from City Hall if the public is going to buy into this scheme." |
| Follow BBC London on Facebook, Twitter and Instagram. Send your story ideas to hellobbclondon@bbc.co.uk | Follow BBC London on Facebook, Twitter and Instagram. Send your story ideas to hellobbclondon@bbc.co.uk |
| Related Topics | Related Topics |
| Transport for London | Transport for London |
| Mayor of London | Mayor of London |
| London | London |
| London Ulez | |
| Sadiq Khan | Sadiq Khan |