Jubilee line is closed Saturday between Waterloo and Wembley park. TFL suggest 96 to Woolwich, DLR to Bank, Central line to Ruislip gardens. then E7 bus or a short walk. Bexleyheath line is also closed.
scampi
Ruislip Gardens is only a 10-15 minute walk from the ground so central line it is. Bexley and Erith lines are both running ok.
Piccadilly line goes to Ruislip.
Train to Charing Cross and then one stop or walk to Leicester Square.