HMS Venturer and HMS Active are fitting out in drydocks, while Formidable and Bulldog progress in the assembly hall.
The £1.25 billion Type 31 programme, based on Denmark's Arrowhead 140 design, sustains around 2,500 jobs and 400 apprenticeships.
The programme's future depends on whether the planned Common Combat Vessel uses the Type 31 hull and is built at Rosyth.
Multiple new British frigates taking shape in Rosyth

