Ambulance Quality Indicators

Accredited Official StatisticThis contains the Ambulance Systems Indicators (AmbSYS) and Clinical Outcomes (AmbCO) for all eleven Ambulance Services in England.

The following webpages are / were updated monthly, with the latest Statistical Notes and monthly spreadsheets:

Time series data

In the following interactive spreadsheets, you can select whether to view data for all England, an individual NHS Ambulance Service, or a region.

  • AmbSYS time series to September 2025 (xlsx, 3.4MB) (published on 9 October 2025): AmbSYS from August 2017 to the latest published month, against specification 20230825 below
  • AmbCO time series to May 2025 (xlsx, 1.7MB) (published on 9 October 2025): AmbCO from April 2011 to the latest published month, against specifications v1.31 and 20210610 below

CSV data

These comma-separated value (csv) files have the same data as the above spreadsheets, but they have no formatting, and none of the footnotes that advise where there are breaks in the Time Series:

Timetable

This shows publication dates (including for revisions) and due dates for data collection.

Current data specification

The following documents contain the specification guidance for data suppliers on what NHS England require.

Superseded data specifications

AmbSYS and AmbCO together:

Clinical Outcomes definitions are unchanged in the above three documents.

Standards

The government pledges on Ambulance waiting times are in the Handbook to the NHS Constitution.
The categories used by Ambulance Services to prioritise emergency incidents are within the description of the Ambulance Response Programme.

Supporting information

Hospital handovers from the Daily Ambulance Collection supplied by Ambulance Trusts and split by NHS Trust;
and Category 2 response times from the weekly scorecard collection split by Integrated Care Board:

This statement describes the quality of the statistics, along with a revisions policy, and information on user engagement:

Old AmbSYS Time Series to March 2018 (xlsx, 658KB) (published on 10 May 2018): AmbSYS from April 2011, against specifications v1.31 and v1.4 above.
Also available as a CSV, without formatting or footnotes: Old AmbSYS April 2011 to March 2018 (csv, 211KB) (published on 10 May 2018).

Also available in an alternative presentation including AmbCO data, a map, call process flowchart, and embedded PDF narrative, but only up to March 2016 data:

The Ambulance Services publication by the Health and Social Care Information Centre contains statistics from the KA34 data collection 2004-05 to 2012-13, which are similar but not directly comparable with the AmbSYS data. It also contains AmbSYS data for 2013-14 and 2014-15.

Weekly Category A response times from 7 November 2010 to 29 May 2011 are still available on our archive website: Ambulance Weekly Sitreps.

Rest of UK

Contact details

NHS England Media Team: 0113 825 0958 or nhsengland.media@nhs.net.

The person responsible for this publication is:
Ian Kay, Operational Insights, Transformation Directorate, NHS England
england.999iucdata@nhs.net
07918 336050