D1010 Serck pump rotary movement at Williton on 10JUL23 video by Colin Foxhall (c) 20/07/2023 depgstaff https://depg.org/wp-content/uploads/sites/33/2023/07/D1010-Serck-pump-rotary-movement-at-Williton-on-10JUL23-video-by-Colin-Foxhall-c.mp4