TfL Ref: 2081-1920

Thank you for your request received by Transport for London (TfL) on 11 October 2019 asking for information about punctuality on our London Overground services.

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. You asked: I would like to know the % of trains on the ELL branch of the London Overground which depart Canonbury for the end station at Highbury and Islington to time (not 1 2 or 5 minutes late), in this direction only, for the period August 2018 to the present time.

From the 1st Aug 2018 to date (15th Oct 2019), the total number of trains that departed Canonbury Station to Highbury & Islington Station was 33,682.

13,835 out of the 33,682 trains departed Canonbury on time which equates to 41.08% of Right Time Start departures at Canonbury.

As Canonbury is located at the north end of the East London Line (ELL), it is relatively more affected by delay elsewhere on the network arriving at this location, which unfortunately sometimes results in trains arriving late at this location.  Causes of delay are varying and there is no single issue which accounts for delay at this location. Approximately 27% of the delay minutes on the ELL are a result of Network Rail Operations which includes signaller error amongst the categories.

Causes of delays are currently being investigated in collaboration with Network Rail using new tools which look at a more granular level of delay and we are assisting with this by using additional station staff at locations south of Canonbury to support right time arrivals at this location. Infrastructure failings such as signal and points failure make up 14% of the delay minutes on the East London Line and we work with Network Rail to ensure that improvement plans are customer focused and delivering to give right time journeys to our many customers that use the East London Line. We hold periodic meetings with Govia Thameslink Railway to ensure that delay in their services is not affecting the running our Overground services and jointly work through plans to reduce the delays occurring to both rail operators.

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