FOI request detail

ULEZ Expansion

Request ID: FOI-2905-2122
Date published: 04 April 2022

You asked

I would like to see the official emissions data taken before and after the ulez expansion.

We answered

TfL Ref: EIR-2905-2122

Thank you for your request received by Transport for London (TfL) on 15th March 2022 asking for information about the ULEZ expansion.

Your request has been considered in accordance with the requirements of the Environmental Information Regulations and our information access policy. 

Specifically you asked:

I would like to see the official emissions data taken before and after the ulez expansion.”

From the wording of your request it is not clear what exact locations and timeframe your request relates to. However, note that TfL itself does not record emissions data. Real-time and historic air quality data across London is publicly available on the London Air Quality Network (LAQN - see here: ), which includes more than 100 monitoring sites. An additional 30 sites located across London - but not part of the LAQN - are also available on the Air Quality England website (see here ). Both sites provide detailed hourly data for all monitoring sites, as well as yearly aggregated statistics.

You may also be interested in the following more general documents published on the TfL / GLA websites: - for general information about ULEZ; - the Guide to ULEZ expansion; - the expansion First Month Report

Please see the attached information sheet for details of your right to appeal.

Yours sincerely,

David Wells
FOI Case Officer
FOI Case Management Team
General Counsel
Transport for London

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