From Gravesend train to Stratford International. 16 min £11. From Gravesend, Clock Tower bus to Bluewater, Bus Station (Bluewater Shopping Centre), line 96 bus to Woolwich Arsenal DLR Station, train to Silvertown, Pontoon Dock, then line 474 bus to East Ham, Newham Town Hall. 2 h 11 min £11. From Gravesend taxi to East Ham. 30 min £98. From Gravesend drive to East Ham. 30 min £4.