Three other people have been treated in hospital.
30 Years For Heathrow T4
Today marks 30 years since Heathrow Terminal 4 was officially opened.
Back in 1986 it was primarily designed for British Airways flights to North America - now it's the home of around 35 airlines.
Prince Charles had his arm in a sling the day he cut the ribbon at T4 alongside Princess Diana on the 1st April 1986.
Ray Stanley has worked there from the very beginning and has told Heart "I don't think there are many jobs where you would see a greater diversity than you would at an airport".
Adding, "at Heathrow it's even more different (...) the types of people you get here and what you have to cater for you have to be ready for just about anything".
30 years ago it cost £200m to build the terminal in today's money that's more than £540m.
Reflecting on his years at Heathrow, Ray said "when you look at the different things that Heathrow has actually been through and this terminal as well as been through - the people that we've got working at Terminal 4 over the years I am very proud to have known some of them. They really are very special".
You can listen to our full conversation with Ray below.
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