Here's the suggested meeting place for this weekends match at Dagenham & Redbridge, which is the Black Lion in Plaistow.
West Ham don’t play until the Sunday so it shouldn’t be too busy.
Plaistow is on the District Line, 20 minutes from Dagenham East
If coming from Waterloo get the Jubilee Line to West Ham and change onto the District Line there. From other destinations it’s best to check the Tfl journey planner as there are quite a few engineering works at the weekend.