Half of the new fleet will be built at AgustaWestland in Yeovil. The contract will have a significant impact on the UK supply chain, providing and sustaining jobs and apprenticeships.
More top news
It will be dry and bright in the morning but as the day goes on it will become wet and very windy.
Eastern parts will have heavy rain in the morning, clearing by afternoon.
Fire and Rescue Service says it received a 999 call to say there had been an explosion in a third floor flat within a mid terraced building.