We are installing some new network equipment in our London rack on 19th November starting 22:00 Hrs. 
The work is required as part of our continual improvement to security, performance and resilience.
While during this change, the live portion of the network will not be modified at this stage; there is a risk while working in the rack of interruption to the live service.
We will monitor the change closely and update here if any issues are encountered.  The work should take no longer than two hours with contingency.

Thank you