The deal could lead to more orders from Japan

The deal, to supply 14 EH101 helicopters over four years, is thought to secure at least 250 jobs for the Somerset-based firm.

In 2002, Westland laid off 950 workers in the county and closed its Weston-super-Mare plant as orders dried up.

It is believed to be the first time the Defence Agency has chosen a European aircraft for its operations.

'Great news'

The helicopters will mainly be used for mine-sweeping, and to help transport supplies to Japan's scientific research base in the arctic.

Westland's spokesperson, David Bath, told the BBC: "The mood here is good: it is always a nice feeling to finally land the contract.

"We have been working on this deal - which is a joint project between ourselves and our Italian partner Agusta - for four or five years."

David Laws, Lib Dem MP for Yeovil, also welcomed the contract.

"This is great news and could help to provide more business for the company in the future.

"Workers at Westland ought to be especially proud as it is the first time that the Japanese Defence Agency has selected a European aircraft of any kind."