TfL Ref 0010-2122 Thank you for your request received by Transport for London (TfL) on 4 April 2021 asking for information about the percentage of buses (all routes) which are ultra-low emission on all routes that travel through Stroud Green Road (N4). Your request has been considered in accordance with the requirements of the Freedom of Information Act and our information access policy. I can confirm that we hold the information you require. All our core fleet is now at the ultra-clean Euro VI engine emission standard, we regard all of our contracted buses passing along Stroud Green Road as being ultra-low emission for particulate matter and oxides of nitrogen. We are looking to clarify our medium term funding position with the Department for Transport so we can continue our plans for converting the current conventional fleet to zero-tailpipe emissions by 2037 and consider options for how this can be brought forward to help the Government with its decarbonisation targets by 2030. If you are considering submitting a further FOI request please think carefully about whether the request is essential at this current time, as answering FOI requests will require the use of limited resources and the attention of staff who could be supporting other essential activity. Where requests are made, please note that our response time may be impacted by the current situation. If this is not the information you are looking for, or if you are unable to access it for any reason, please do not hesitate to contact me. Please see the attached information sheet for details of your right to appeal as well as information on copyright and what to do if you would like to re-use any of the information we have disclosed. Yours sincerely Sara Thomas FOI Case Management Team General Counsel Transport for London