Update 16:16:
Most services should now be restored following repair work by power teams, restoring service to the affected suites.
Should you still be experiencing difficulties, please get in touch via standard support channels.
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We are aware of of a major BT outage currently affecting some of our customers.
We have seen service drop simultaneously across multiple diversely routed BT fibre connections across London, and BT have acknowledged the fault and are working to restore services.
Our sincere apologies for the disruption this morning, and we will continue to provide updates as we receive them.