That point on purchasing power is a very pertinent one. I hope that the Minister replies to it, because it is a point well made.
Uncertainties and over-optimism—there is over-optimism—in the project costs mean that the final costs of the defence equipment plan may be significantly understated. The MOD’s cost assurance and analysis service reported that the costs in the 2016 plan were understated by £4.8 billion. Over a period of years, the MOD has failed to agree a workable way forward with the prime contractor on the procurement of a Type 26 warship, which has compromised maritime capability and placed further upward pressure on costs.