there's a sign at ExCeL about public rights of way closures during DSEi.
Here's the text on it:
Custom House DLR to Royal Victoria Dock Bridge
Prince Regent Station to Dock Edge
Dock Edge Public Realm from Corniche to Connaught Cut
Royal Victoria DLR to Dock Edge
Royal Victoria Dock Footbridge
Email email@example.com with queries.
Apparently a 'corniche' is a winding road at the top of a cliff or
something, and in this context it means the west side of the dock. So basically you won't be able to get to the north side of Royal Victoria Dock from Thursday (8th Sept).