True there’s a tube strike but it’s not affecting the whole of the underground at least before the game, according to the TFL journey planner.
I’m travelling from Chiswick and you can get from Chiswick Park on the district line to Mile End then the central line to Stratford though you’re advised to complete journeys before 17.30 so fine before the game but have to get on your toes after.
Not sure if this was covered in a post earlier but anyways…