Editing Astute-class submarine (section)

===Programme cost summary===
{|class=wikitable
|+ '''National Audit Office: Major Projects Report 2015'''<ref name="NAO2015">{{cite book|title=National Audit Office: Major Projects Report 2015|date=20 October 2015|publisher=National Audit Office|location=United Kingdom|page=42|url=https://www.nao.org.uk/wp-content/uploads/2015/10/Major-Projects-Report-2015-and-the-Equipment-Plan-2015-2025.pdf|access-date=27 July 2016|archive-date=29 June 2016|archive-url=https://web.archive.org/web/20160629094448/https://www.nao.org.uk/wp-content/uploads/2015/10/Major-Projects-Report-2015-and-the-Equipment-Plan-2015-2025.pdf|url-status=live}}</ref>
|-
! 
! Expected cost to completion at approval
! Current forecast cost to completion
! Change
|-
| Boats 1–3
| style="text-align:center;" | £2.233 billion
| style="text-align:center;" | £3.536 billion
| style="text-align:center;" | {{IncreaseNegative}}58% Increase
|-
| Boat 4
| style="text-align:center;" | £1.279 billion
| style="text-align:center;" | £1.492 billion
| style="text-align:center;" | {{IncreaseNegative}}16% Increase
|-
| Boat 5
| style="text-align:center;" | £1.464 billion
| style="text-align:center;" | £1.420 billion
| style="text-align:center;" | {{DecreasePositive}}3% Decrease
|-
| Boat 6
| style="text-align:center;" | £1.579 billion
| style="text-align:center;" | £1.533 billion
| style="text-align:center;" | {{DecreasePositive}}3% Decrease
|-
| Boat 7
| style="text-align:center;" | £1.642 billion
| style="text-align:center;" | £1.640 billion
| style="text-align:center;" | {{Steady}}
|}