At Babcock's Devonport yard, the 1,300 Prospect members have accepted an offer from November 1 for an unconsolidated lump sum payment of £1,000.

In November 2012, they will receive an unconsolidated lump sum worth £900 and in October 2013, a consolidated increase equivalent to the three-year average of RPI plus 0.5 per cent.

The 2013 increase is guaranteed to be at least 2 per cent and if it exceeds 5 per cent, the excess will be paid as a one-off unconsolidated payment.

Meanwhile, at Rosyth dockyard, the 600-strong branch has accepted an offer backdated to April 1. In year one, members will receive an unconsolidated award of £850, plus an advance of £150 from a performance-related payment for 2012, in recognition of this year's late award.

In year two, the award is worth £900 plus the rest of the PRP payment of £150. For year three, members will receive a 5 per cent increase in basic pay.