| Twyford – Newton Purcell early works | Completed | Newton Purcell, Turweston | 30/10/2020 | 31/08/2021 |
| Twyford construction compound and archaeology | Completed | Calvert, Steeple Claydon | 29/01/2021 | 30/06/2021 |
| Steeple Claydon construction activities | Completed | Steeple Claydon | 02/02/2021 | 31/08/2021 |
| Steeple Claydon construction activities February 2021 | Completed | Steeple Claydon | 08/03/2021 | 12/03/2021 |
| Upcoming works in the Camden Cutting area; utility surveys, trial holes, monitoring equipment and lane closures | Completed | Park Village East | 01/03/2021 | 31/05/2021 |
| Notice Update: Utilities trial hole surveys at Parkway | Completed | Camden | 24/11/2020 | 09/03/2021 |
| Vehicle Holding Area and Parkway works notices | Completed | Camden, Parkway, Prince Albert Road | 01/03/2021 | 14/10/2021 |
| Notice of installation of electricity cables at various locations in Camden | Completed | Amersham, Camden | 15/01/2021 | 31/08/2021 |
| Tower cranes removal from Camden Cutting south | Completed | Camden | 04/07/2023 | 16/07/2023 |
| Notice of track-level works in Euston Approaches | Completed | Mornington Crescent | 27/09/2020 | 30/04/2021 |
| Notice of archaeology work off Rookery Lane | Completed | Hints | 08/03/2021 | 19/04/2021 |
| Notice of cable route excavation, Adelaide Road | Completed | Chalk Farm | 19/05/2021 | 31/08/2021 |
| Colne Valley Construction Update, Autumn 2020 – Spring 2021 | Completed | Colne Valley, Denham | 30/11/2020 | 30/04/2021 |
| Notice of archaeological trial trench works – Upper Boddington | Completed | Boddington, Wormleighton | 04/01/2021 | 30/04/2021 |
| Notice of archaeological excavation works, Edgcote | Completed | Edgcote | 08/02/2021 | 31/08/2021 |
| Notice of early works from Chipping Warden to Wills Pastures | Completed | Chipping Warden, Southam | 05/10/2020 | 31/08/2021 |
| Notice of enabling works update in the Radstone area | Completed | Radstone | 01/02/2021 | 31/08/2021 |
| Notice of ecological woodland planting, south of Radstone | Completed | Radstone | 04/01/2021 | 30/04/2021 |
| Notice of early works from Greatworth to Edgcote | Completed | Edgcote, Greatworth | 07/12/2020 | 23/08/2021 |
| Notice of archaeological excavation works, Greatworth to Edgcote | Completed | Edgcote, Greatworth | 02/11/2020 | 30/06/2021 |