Is it Turners flash (Blackwaters) not been over them for a few years.
John I made a point at having a dig at one of your photos on another thread, let me now say all these photos you have posted in this thread are very,very good.
On first viewing I thought that weir/small waterfall on the yarrow was the one at Roach Bridge on the River Darwen (Darren), I have not been there since the Roach Bridge paper mill closed, have you seen it lately or fished the Darren.