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Data Provider: Welsh Government National Statistics Performance against 4 hour waiting times target, all emergency care facilities by local health board
LHB Provider[Filter]
Area Code[Filtered]
Click here to sortTotal attendancesClick here to sortAttendances where patients spend less than the target time in A&EClick here to sortPercentage of patients who spend less than the target time in A&E
[Expand]Betsi Cadwaladr University Local Health Board18,80314,52977.3
[Expand]Powys Teaching Local Health Board1,5411,53999.9
[Expand]Hywel Dda University Local Health Board12,35410,60685.9
[Expand]Abertawe Bro Morgannwg University LHB15,81611,97975.7
[Expand]Cwm Taf University Local Health Board11,2999,34282.7
[Expand]Aneurin Bevan University Local Health Board14,32411,32779.1
[Expand]Cardiff & Vale University Local Health Board12,19610,51986.2


Performance against waiting times targets, all emergency care facilities by local health board

Last update
20 April 2017 20 April 2017

Next update
18 May 2017

Publishing organisation
Welsh Government

Source 1
Emergency department data set (EDDS), NHS Wales Informatics Services (NWIS)

Contact email

National Statistics

Lowest level of geographical disaggregation
Local health boards

Geographical coverage

Languages covered
English and Welsh

Data licensing
You may use and re-use this data free of charge in any format or medium, under the terms of the Open Government License - see

General description
Data Prior to January 2013 will not be directly comparable with data for January 2013 onwards due to a change in methodology. See notes in March 2013 release for more details.
For the August 2012 data onwards, there was a new approach to publishing the emergency departments waiting times data: Prior to August 2012 data, the monthly emergency departments waiting times data was published by Welsh Government as official statistics in a Statistical Release, with more detailed data on StatsWales.
For August 2012 data onwards, the monthly data is published by NHS Wales Informatics Service (NWIS) on their website as management information, around 15th of each month Welsh Government will then produce an improved official statistics publication on a less frequent basis (to be decided after feedback from users via a formal consultation). StatsWales will be updated with monthly data when the official statistics are released.
There were some technical changes to A&E reporting, that were implemented from December 2011 around clinical and operational exclusions.
From December 2011, the guidance below now applies in Wales. So, the two situations below will no longer be counted as a breach of the targets: If a clinician decides that the safest place for a patient is the emergency department, the patient should remain there until it is safe to move them; and patients should not be admitted solely to avoid a breach of the targets. Clinicians should admit patients only to appropriate facilities and only when it is appropriate to do so.
For the December 2011 data, Cardiff and Vale University and Betsi Cadwaladr University LHBs were not able to implement the change to the guidance around clinical exclusions. For the January to July 2012 data, Betsi Cadwaladr University LHB was not able to fully implement the change for all months and Cardiff and Vale University LHB was only able to implement it for 26 to 31 January, but have fully implemented it from the February 2012 data.
(Cardiff and Vale University informed us that they had to develop and test its systems and train users to ensure a robust collection around clinical exclusions to comply with the new EU compliance guidance. This was completed late in January.)
Therefore the Wales figures for December 2011 to June 2012 are likely to be lower than expected.

From April 2010 until 31 March 2012, information on attendances at major A&E departments was taken from the Emergency Department Data Set (EDDS) and attendances at minor injury units/other A&E departments from the weekly Situation Reporting System (SITREPS).
From 1 April 2012, minor injury units/other A&E departments have been supplying their data via EDDS or a subset of EDDS (for those other A&E/minor injury units who are unable to submit the full EDDS) on a monthly basis.There will be a minor impact on the data relating to attendances at other A&E/minor injury units for April 2012 onwards. Prior to this, this data was based on a four/five weekly cycle rather than calendar month data, so depending on which month it was, the data will have included a few days more or less attendances than in the actual calendar month. Users should consider this when comparing attendance data for other A&E/minor injury units before and after April 2012.
Please see the Quality Report for more information.
A target around the eradication of 12 hour or more waits in all emergency care facilities from April 2013 onwards was introduced in the NHS Wales Delivery Framework for 2013-14, therefore data on the 12 hour target is not available before this date.

Data collection and calculation
Please find this information in the related statistical release, as per the given weblink.

Frequency of publication

Data reference periods
April 2013 onwards

Users, uses and context
Please find this information in the related statistical release, as per the given weblink.

Revisions information
On a monthly basis, LHBs can resubmit data to NWIS if they have carried further validation during the month and they need to revise their data. In 2013, we looked at the size and impact of the resubmissions for the data. The impact of the changes tended to be minimal accounting for less than one percentage point change against the 4 hour target for ‘A&E departments’. In July 2016, all local health boards were given the opportunity to submit a financial returns resubmission. The revised data is presented on StatsWales, although these revisions have not been reflected in the monthly NWIS publication for the months April – November 2015.

Statistical quality
Please find this information in the related statistical release, as per the given weblink.

The most recent statistical release can be found on the following weblink:

Waiting times; A&E