It does seem to be there now:
"On Friday 22, Saturday 23, Sunday 24 and Monday 25 April, no service between Canning Town and Beckton.
A replacement bus service will operate between Canning Town and Beckton calling at Royal Victoria, Custom House, Prince Regent, Royal Albert, Beckton Park, Cyprus and Gallions Reach. On Sunday buses will be extended from Canning Town to Canary Wharf calling at East India and Blackwall.
On Sunday 24 April, no service between Westferry and Woolwich Arsenal.
Replacement buses will run between Canary Wharf and North Woolwich Ferry calling at Blackwall, East India, Canning Town, West Silvertown, Pontoon Dock, London City Airport and King George V.
On Friday 22, Saturday 23, Sunday 24 and Monday 25 April, trains will not serve Bank station. Services will be diverted to run to and from Tower Gateway.
Easter Holiday Weekend Services
On Friday 22 April services will operate Tower Gateway - Woolwich Arsenal, Tower Gateway - Canary Wharf - Lewisham, and Stratford - Canary Wharf - Lewisham.
On Saturday 23 April services will operate Tower Gateway - Woolwich Arsenal, Tower Gateway - Canary Wharf - Lewisham, and Bow Church - Canary Wharf - Lewisham.
On Sunday 24 April services will operate Tower Gateway - Canary Wharf - Lewisham, and Bow Church - Canary Wharf - Lewisham.
On Monday 25 April services will operate Tower Gateway - Woolwich Arsenal, Tower Gateway - Canary Wharf - Lewisham, and Stratford - Canary Wharf - Lewisham.
On Saturday 23 and Sunday 24 April, no service between Bow Church and Stratford.
A replacement bus service will operate".
Luckily I'm flying from LHR this weekend