A giant foaming 'sinkhole' spewing out "alien" foam has appeared on a rugby pitch where HS2 is being built.
Work on the project was stopped for several hours after dog walkers found the brown foam bubbling out the ground at Ruislip RFC in west London.
According to HS2, workers moved to seal off the area which was “most likely caused” by one of the tunnelling machines passing through a small pre-existing borehole.
Jatin Radia, 45, chairman of Ruislip RFC, described the bubbling pool as “alien” and added: “I was watching his 14-year-old son play NFL on Saturday morning when my phone started blowing up.”
“Members of the rugby club were sending me photos and videos asking me what was going on.
