Costs of the programme to March 2018 were £1.08 billion, more than £200 million above the original budget. The original order was for 54 Watchkeepers, though it has not been confirmed that more than 45 had been delivered at that date. A report by the Major Projects Authority, published in June 2015, revealed that the estimated cost of achieving full operational capbility of the program is £1.2bn.
