Difficult to date the picture but the basin was open until circa 1970 when a bund cut it off from the main canal. The photo may just show some water at the Basin entrance but no attempt has been made to park the empty boat in it. Tree growth at the entrance is fairly advanced but it doesn't take many years for crack willow to grow and fall over in water.
I was involved as a volunteer in the project to open up the basin again as a mooring for heritage boats on public display, and with the help of IWA Waterways Recovery Group, great progress was made. When CRT West Midlands took over management of Hillmorton from South East, they pleaded lack of funds as the reason they would not add it to their list of restoration projects so could not oversee the volunteers. CRT said they could only continue as an independent commercial operation under the rules for building a marina, and insisted that the volunteers lease the basin at full market rent. So after two years of inactivity the volunteers could not accept that they must pay CRT for restoring their canal as a public heritage asset so the plan to re-water was reluctantly abandoned. However, having already adopted the Basin under the CRT Volunteer scheme (which is different CRT management) the group of volunteers are now clearing it again to create a sunken garden in time for the 250th anniversary of the death of James Brindley whose last ever canal had reached this very spot on the day he died. So stand by for a party in September 2022 and join in the fun now to make the site ready. And who knows - the plan for a heritage mooring may rise again.