Thames Tideway Tunnel (DEFRA) appears in 2 snapshots of the UK GMPP, from 2015 Sep to 2016 Sep.
Its cost is £4.2b at 2016 Sep, against £4.2b at 2015 Sep: -1%.
Its planned finish is 31 Dec 2023, unchanged from the 31 Dec 2023 first planned.
Its latest rating is Amber/Green (2016 Sep).
Cite: IPA / NISTA (Cabinet Office) (2026). UK Government Major Projects Portfolio (GMPP): Thames Tideway Tunnel. Tollgate Data, https://data.tollgatehq.com/projects/uk-gmpp/thamestidewaytunnel, as at 31 Mar 2026. Licence: OGL v3.
How much does Thames Tideway Tunnel cost? Its cost is £4.2b at 2016 Sep, against £4.2b at 2015 Sep: -1%.
Is Thames Tideway Tunnel late? Its planned finish is 31 Dec 2023, unchanged from the 31 Dec 2023 first planned.
What is Thames Tideway Tunnel's latest rating? Its latest rating is Amber/Green (2016 Sep).