Staveley Weir

I should have taken my proper camera with me today for a flat walk around Staveley with Mr P.   There was an impressive amount of water flowing over the weirs and I wanted a slow shutter speed shot. Only I couldn't work out how to do one with my phone.  I should have Googled it there and then by the weir because back home I've taken another look and found the button I needed.  Next time I'll know.