Those killed in the helicopter crash in Norfolk have been named by the Norbrook Group. Lord Ballyedmond, who was killed in the crash, was the founding member of the pharmaceutical company.
The statement reads:
"Norbrook management and staff also mourn the loss of their friends and colleagues Declan Small (Site Foreman), Captain Carl Dickerson (Pilot) and Captain Lee Hoyle (Pilot).
Our thoughts are with the immediate families and friends of the deceased who have requested privacy at this difficult time."
A report on the cause of the helicopter crash in Glasgow in December has found that both engines flamed out before the helicopter hit the ground.
The investigating team also concluded that the main rotor and tail rotor blade were not rotating at the moment of impact, and that no fuel leaked from the aircraft before it crashed.
In 2004, Pete Barnes carried out a daring rescue of a motorist from a flooded ford in County Durham while working for the Great North Air Ambulance.
The paramedic who flew with him on that mission said he was one of the best pilots he had ever flown with.
The pilot of the helicopter which crashed in central London had thousands of hours of flying experience including for films such as Die Another Day and Saving Private Ryan.
Pete Barnes, who died when the helicopter he was flying hit a crane on a high building and crashed onto a street in Vauxhall, had amassed around 9,000 hours of flying time, including 3,500 hours on the type of craft he was piloting today.
Eyewitness Steve Webster saw the crash. He thought the helicopter was in difficulties before it hit the crane.
Reuters reports that a senior Kenyan Cabinet Minister and his deputy have been killed in a helicopter crash.
The police aircraft reportedly crashed into a forest just outside of the capital Nairobi and burst into flames, local television stations say.
Kenyan Prime Minister Raila Odinga's spokesman said he had been informed of the deaths of internal security minister George Saitoti and his deputy, Orwa Ojode.