My thanks to Bath Newseum regular Sally Helvey for photographing some work underway on the Kennet and Avon Canal earlier today.
Apparently, there is a major dredging operation going on involving people from the Canal and River Trust.
According to their Notices and Stgoppages web page:
Please be advised that we will be dredging between Weston Lock and Bath Tunnel No. 1, to improve the Navigation and help water conservation in the short lock pounds of Bath Flight. Working practices have been amended in accordance with the current Government coronavirus guidelines, to enable work to proceed.
The Navigation and towpath will remain open, though boaters may incur short delays. Towpath users are requested to pass works with care, follow the advice of the crew and observe social distancing as necessary.

I also spoke to Ian Herve – who is Vice-Chair of the Bath and Bristol branch of the Kennet and Avon Canal Trust – and he told me:
‘That’s the dredging team. Looks like the barge that takes the dredging down to be spread beyond Newbridge. They have an agreement to put it through a screen before spreading it on the fields at the A36/A4 Turnpike.
