Предыстория:
In April 2004, the UK and US governments reached an agreement for the British to buy 64 of the new generation of Tomahawk missile—the Block IV or TacTom missile. It entered service with the Royal Navy on 27 March 2008, three months ahead of schedule. In July 2014 the US approved the sale to the UK of a further 65 submarine-launched Block IV's at a cost of US$140m including spares and support; as of 2011 the Block III missiles were on Britain's books at £1.1m and the Block IV at £0.87m including VAT http://en.wikipedia.org/wiki/Tomahawk_%28missile%29