TfL Ref 0048-2021/22 Thank you for your request received by Transport for London (TfL) on 11 April 2021 asking for a map showing exactly where the Northern line runs in relation to the streets of Hampstead. 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. Please see the map in the following link: https://arcg.is/19Wfvj which shows the centre line of the rail in both directions. 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