Update on cyber incident: Clinical impact in south east London – Thursday 4 July

NHS England London has released its latest weekly data update on the clinical impact of the ransomware cyber attack against Synnovis on Monday 3 June.

Over four weeks on from the cyber attack, NHS organisations across London continue to work in partnership to ensure people who require critical and urgent care receive it.

NHS England is also continuing to work with Synnovis and the National Crime Agency to respond to the criminal ransomware attack on Synnovis systems.

In response to the attack, NHS England London declared a regional incident and continues to coordinate work across affected services, as well as with neighbouring providers and national partners to manage disruption.

Some services, such as outpatient appointments, are now operating to similar levels to before the incident but there continues to be disruption to other services.

Urgent and emergency services have remained available as usual, and patients should access services in the normal way by dialling 999 in an emergency and otherwise use NHS 111 through the NHS App, online or on the phone.

Patients will be kept informed about any changes to their treatment by the NHS organisation caring for them. This will be through the usual contact routes including texts, phone calls and letters.

The data for the fourth week of reporting (24-30 June) shows that across the two most affected trusts, King’s College Hospital NHS Foundation Trust and Guy’s and St Thomas’ NHS Foundation Trust, 1,517 acute outpatient appointments and 136 elective procedures had to be postponed because of the attack.

This means so far 4,913 acute outpatient appointments and 1,391 elective procedures and have been postponed at King’s College Hospital NHS Foundation Trust and Guy’s and St Thomas’ NHS Foundation Trust since 3 June.

Dr Chris Streather, Medical Director for NHS London, said: “I’m incredibly proud of how the NHS in London continues to work to minimise the impact on patients, with staff working hard to maintain patient safety and provide the high-quality care that we strive for across the capital.

“Although we are seeing significant progress, with most services operating near to normal, we continue to work tirelessly in partnership with our colleagues across London to ensure all services are back to being fully operational as quickly as possible.

“Last week, King’s College Hospital and Guy’s and St Thomas’ NHS Foundation Trusts had to deal with the added pressure of industrial action which put further demands on staff, so I would like to recognise the hard work of all their staff who put robust plans in place to maintain patient safety.

“The mutual aid agreements that have been put in place in primary care continue to show progress to meet urgent demand, with pathology services now operating at 54% of the capacity they had prior to the cyber attack – helping to increase the number of blood tests available in the most critical and urgent cases.”

NHS Blood and Transplant have called out to O Positive and O Negative blood donors to urgently book appointments to donate in one of the 25 town and city centre NHS Blood Donor Centres in England, to boost stocks of O type blood following the cyber incident. You can visit or call 0300 123 23 23 to book an appointment.

Investigations of this type are complex and can take time. Given the complexity of the investigation, it may be some time before it is clear which individuals have been impacted.

As more detail becomes available through Synnovis’ full investigation, the NHS will continue to provide updates and a helpline has been set up to support people impacted (incident helpline: 0345 8778967).

More details on the incident, including a questions and answers section, are available on the NHS England website.



NHS London impact update based on provisional data reported by trusts and organisations involved.

Please note all numbers quoted are drawn from unvalidated management information; these have been provided in the interests of transparency.

Updates will be provided on a weekly basis as the incident continues.

The update covers the week of 24th – 30th June 2024.

The data does not include appointments postponed due to industrial action by junior doctors, which ran from 7am on Thursday 27 June until 7am on Tuesday 2 July.

The next update will be on Thursday 11 July.


Planned care (day case and inpatient treatments)

Across Guy’s and St Thomas’ and King’s College Hospital NHS Foundation Trusts there have been:

  1. 136 elective procedures postponed (compared to 205 cancellations for the week commencing 17 June)
  2. 13 of these were cancer treatments (compared to 24 last week; a figure of 20 was provided for w/c 17 June previously, but this has been revised following validation)

There is no immediate significant impact on cancer reported metrics. It is too early to understand the impact on 62-day performance and or Faster Diagnosis Standard for the affected trusts.


Transplant impact

29 organs were diverted for use by other Trusts (compared to 21 last week; a figure of 15 was originally provided for the week commencing 17 June but this has been revised following further validation).



Across Guy’s and St Thomas’ and King’s College Hospital NHS Foundation Trusts:

Zero planned C-sections have been postponed/rescheduled in the last week (compared to zero the week before; a figure of one was originally provided but this was revised following further validation).



Across Guy’s and St Thomas’ and King’s College Hospital NHS Foundation Trusts there have been:

  1. 1,517 hospital outpatient appointments postponed in the last week (compared to 1,300 last week)
  2. 127 community outpatient appointments postponed in the last week (compared to 101 last week; a figure of 30 was provided last week but this has been revised following further validation)


Blood tests

South East London pathology services provided this week have increased to approximately 54% of normal capacity – compared to 45% last week.


Primary care

Primary care appointments are going ahead as normal, however blood tests are being prioritised for urgent cases.

Impact on services and tests has varied however GP referrals have been significantly impacted with only urgent referrals being accepted for Blood Sciences (haematology, biochemistry, immunology, virology). Normal services are operating for histology (a diagnosis and study of the tissues which are used to diagnose infections, cancer and other diseases) and cervical smears.


Wider impact

Synnovis provides specialist tests for other hospitals in the country. However, the material service impact remains in south east London. Guy’s and St Thomas’ NHS Foundation Trust, King’s College Hospital NHS Foundation Trust and South London and Maudsley NHS Foundation Trust remain in a critical incident, while Oxleas NHS Foundation Trust, Lewisham and Greenwich NHS Trust, Bromley Healthcare, and primary care services in South East London continue to be significantly impacted and involved in the incident response.


Previous weekly data figures can be found here.