A spokesman for Crossrail said today:
“Crossrail regards the safety of all those working on the project as paramount and requires all workers to adhere to strict safety requirements including an obligation to raise any concerns.
We fully investigated Unite’s specific claims and found no evidence to support them. Crossrail has written to Unite on several occasions to update them on industry and health safety issues but has yet to receive a response.”
More top news
Hundreds of passengers were ordered to leave the terminal building and flights grounded after passengers suffered difficulties breathing.
Council leaders today called on the government to provide extra money to help resettle the youngsters in the capital.
An eyewitness said: "It was very unnerving. It was just after 12pm and there were suddenly police vans and cars everywhere."