The latest information about winter works programme can be found on .gov.uk here:
https://www.gov.uk/guidance/river-th...-lock-closures

Listed below are the locks that will be closed during the 2019 to 2020 investment programme. The locks will be closed from the first date listed and re-open on the day after the final date:

When Where What’s happening
4 November 2019 to 6 December 2019 Hambleden Lock Replacing tail layby fender timbers, including an additional line of fenders at the raised section of the layby.
11 November 2019 to 20 December 2019 Sandford Lock Installing new fenders on head and tail laybys and tail bullnose.
18 November 2019 to 24 January 2020 Shifford Lock Reconstructing the lock side concrete. Replacing the bullnose timbers. Replacing head layby fenders.
25 November 2019 to 24 December 2019 Whitchurch Lock Refurbishing the lock chamber walls. Reconstructing the head bullnose (approach wall).
6 January 2020 to 31 March 2020 Culham Lock Widening and refurbishing the mooring bank at the head lock cut visitor moorings to improve access.
14 January 2020 to 14 February 2020 Rushey Lock Creating a new head layby walkway and reconstructing the water point building on the layby.
No lock closure required Abingdon Lock Replacing the head layby canoe portage. This has been reassessed as not disrupting the lock access.
Other major works
We will also be carrying out other major works on the River Thames during 2019 to 2020. Please see below for details. These works will not affect you using the locks during the construction:
* Harts Footbridge (Northmoor reach) - refurbishment of the bridge components. Please prepare for significant disruption between 6 January 2020 and 31 March 2020. During this period it may not be possible to pass under the bridge.
Various towpath bridges - structural assessments of various towpath bridges to investment needs for future years.
Various lock sites - carrying out condition surveys at various locks to identify investment needs for future years.
Abingdon Lock - replacement of the head canoe portage and refurbishment of the sani-station building. Work to progress between 10 February 2020 and 6 March 2020.
* Culham Lock - Sutton Bridge - underpinning of the masonry arch and reinstatement of the revetments. River closure needed for divers to carry out these works between 4 November 2019 and 31 December 2019. You may be asked to wait for short periods while the divers are in the water.
Molesey Lock - phase 1 (design and fabrication) of the lock gates. Installation will be during winter 2020.
Godstow Lock - detailed design of Godstow Weir B - 'Trout Weir'.
Sunbury Island - demolition of Wilson's Boatyard buildings. Contractors will be accessing Sunbury Island from the lock cut and will be blocking the channel between 4 November 2019 and 31 March 2020. Please prepare for disruption during this period.
Days lock - fabrication of new timber lock gates, which will be installed during winter 2020.EA Winter Works programme