England and Billy Vunipola expect hot reception from Tonga under the dome

• George: team may use coded lineout signs to beat cacophony• Tonga ‘will be looking to smash’ Billy Vunipola, says coachJamie George believes England may be forced to adopt a coded sign language during lineouts against Tonga because of the unique atmosphere expected in the Sapporo Dome. England begin their World Cup campaign on Sunday at the 42,000-seat indoor stadium, with Eddie Jones warning his squad it is likely to be the loudest venue they play in, based on information received from the England football team who faced Argentina there at the 2002 World Cup.Their opponents have also promis…