Tory peer Lord Ballyedmond was among four killed after a helicopter crashed in Beccles.
A specialist seal centre needs help caring for the 120 pups they have taken in since the Norfolk storms in December.
Round up of the US press on the helicopter crash in North Norfolk.
David Cameron said in a statement:
Lord Ballyedmond was a towering figure in Northern Irish business life, and passionate about peace and good relations north and south, east and west.
He was a larger than life figure who was a great supporter of the Conservative party and a good friend to me.
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."
The helicopter that crashed in Norfolk last night, killing four people, took off from the stately home Gillingham Hall, police confirmed.
The property was owned by Conservative peer Lord Ballyedmond, who was among the four men killed in the crash.
Norfolk Police added that a "significant cordon" remained in place around the site of the crash.
Conservative peer Lord Ballyedmond, who was among four people killed in a helicopter crash in Norfolk, had previously raised safety concerns with the aircraft's manufacturers.
AgustaWestland said they were investigating but that "there could be many causes" behind last night's crash.
Conservative peer Lord Ballyedmond was among the four people killed in a helicopter crash in Norfolk last night.
The helicopter wreckage is alongside the A146 in Gillingham, near Beccles, Norfolk.
Conservative peer Lord Ballyedmond was one of the four men killed in a helicopter crash in Norfolk yesterday.
Here is a profile on the peer:
- He was one of the richest men in Northern Ireland and had an estimated wealth of around £500 million.
- Lord Ballyedmond was the chairman of Norbrook, the largest privately owned pharmaceutical company in the world.
- He was known as Edward Haughey until he was made a life peer in 2004.
- The peer owned Gillingham Hall, a stately home near the crash site.
- Lord Ballyedmond served in the upper houses of both Britain and Ireland.
- He was 70-years-old and leaves behind his wife Lady Mary, who he had two sons and a daughter with.
Tributes have been coming in to the Northern Irish Conservative peer Lord Ballyedmond who died in the helicopter crash at Gillingham last night.
Stormont Enterprise Minister Arlene Foster, said. "Without doubt, Lord Ballyedmond was one of Northern Ireland's most successful entrepreneurs.
"He was known for his leadership, integrity and global vision. One of a kind and a self made businessman, he was both highly regarded and widely respected by all those who knew him."
Four men were killed in Norfolk last night after an Augusta Westland helicopter crashed in Gillingham, near Beccles, police have confirmed.
The force added that a significant cordon remains around the crash site which needs to be "properly assessed in daylight."
Northern Irish Conservative peer Lord Ballyedmond was among the four people killed in a helicopter crash in Norfolk last night, the Press Association has reported.
Known as Edward Haughey until he was made a life peer in 2004, he owned Gillingham Hall, a stately home near the crash site.
The helicopter crash in Norfolk which left four people dead happened near a stately home owned by one of Northern Ireland's richest men Lord Ballyedmond.
The peer is the chairman of Norbrook, one of the largest privately owned pharmaceutical company's in the world, and he also owns Gillingham Hall.