Our transit provider, had network hardware shipped to London earlier this month which was found to be dead on arrival. The replacement units have arrived and completed all tests. These will be installed to complete the required upgrades for their EMEA network.
This maintenance window was created by them due to the issues they saw the other night - any occasional previous ~10-minute drops should be resolved going forward, once this work has been completed.
They expect outages to last less than 10 minutes during this maintenance window.