The £1.5 billion deal will also see new fleet rolled out across the network.
RAF Marham Serviceman 'Threatened With Knife'
Police say a serviceman has been threatened with a knife near the married quarters of an RAF base.
The serviceman is understood to have been approached by two men with a knife at RAF Marham, near King's Lynn in Norfolk, at about 3pm on Wednesday.
The men then escaped in a dark-coloured Ford Galaxy.
The serviceman, who was not in uniform, was not injured.
Norfolk Constabulary said they would not speculate on whether the incident was terrorism-related and they have not issued a description of the attackers.
Officers are now carrying out extra patrols in the area.
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