Video report by ITV News Correspondent Neil Connery
Three British Airways crew members died after a car collided with a lorry on New Year's Eve near to Heathrow Airport.
Two men aged 25 and 23, and a 20-year-old woman died at the scene, while a 25-year-old woman is in hospital in a serious condition.
In a statement on Wednesday evening, British Airways said: "We're deeply saddened to learn of the death of our colleagues involved in a road traffic collision last night.
"Our thoughts are with their family and friends, who we are supporting at this distressing time."
It is believed that all four cabin crew were friends. Two of them had reportedly finished work at around 6pm, while the others were on a day off and not scheduled to be on duty.
A Gofundme page called BA Angels Fund has been set up by colleagues of the three people killed in their memory.
The page organisers said they hope to "raise money so that we as a fleet can send a nice flower arrangement to the 3 crew members funerals and hopefully make a nice donation to a charity of the families choosing."
As of Wednesday night, the fund had nearly reached its £30,000 target.
Those who died were travelling in a white Toyota Yaris which collided with a white Mercedes HGV at the junction of Bedfont Road and Long Lane in Stanwell, Surrey at 11.39pm.
The HGV left the road and ended up in Longford River, which runs parallel with Bedfont Road, Surrey Police said.
The lorry driver was taken to hospital as a precaution.
No arrests have been made.
The road remains closed while recovery of the HGV takes place.
Sergeant Chris Schultze, of Surrey and Sussex Roads Policing Unit, said: "Our thoughts are with the family and friends of those involved in this collision at what is an extremely difficult time.
"We are continuing to appeal for witnesses to what happened and would urge anyone who may have any video footage, CCTV or dashcam or any other kind, to get in touch with us."
A spokesman for dnata - which provides ground handling, cargo, travel, and flight catering services to BA - said: "We can confirm that one of our trucks was involved in a road traffic accident on the evening of December 31.
"We are fully assisting relevant authorities with their investigations. Our thoughts and condolences are with the families of those affected by this very sad incident."
A local driver, who did not want to be named, said the crash scene looked "bad".
He described it as "a bad road" that needs widening, adding: "You would be amazed how many accidents have happened down that road."