ITS Technology Group experienced a major incident on June 3, 2026 affecting Mayfair and Marylebone to Lower Holloway, lasting 7d 11h. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- investigating Jun 03, 2026, 07:39 PM UTC
MSO INC-000000654 : We are currently experiencing an incident impacting some customers in the Marylebone area. Preliminary investigations are underway with our engineers to determine the root cause of this network incident. At this stage we are unable to issue an ERT until our engineers have completed further diagnostics.
- investigating Jun 03, 2026, 07:45 PM UTC
Our engineer has been dispatched to the local exchange to investigate, next update at 21:15
- investigating Jun 03, 2026, 08:20 PM UTC
Our engineer are expected to arrive at the exchange imminently where they will conduct their investigations. Next update at 21:45.
- investigating Jun 03, 2026, 08:45 PM UTC
Our engineers are on site and working on the issue at the local exchange. Next update at 22:15
- identified Jun 03, 2026, 09:23 PM UTC
Our engineers have identified one of the OLTs have lost power. They are working through the fault to bring the power back on. Next update 23:00
- identified Jun 03, 2026, 10:36 PM UTC
Our engineers are continuing to work at the exchange on the OLT to bring the power back. Next update at 00:00
- identified Jun 03, 2026, 11:15 PM UTC
Our engineers are continuing their work at the exchange and are replacing one of the OLTs. Next update 01:00
- monitoring Jun 04, 2026, 12:18 AM UTC
All services are back online after the OLT was replaced. We will continue to monitor.
- resolved Jun 11, 2026, 06:39 AM UTC
This incident has been resolved.