Slenningford Watermill Campsite Upcoming Events 9:30 am – 11:30 am, August 13, 2022 – River Session 9.30 - 11.30 on the River Calder 9:30 am – 11:30 am, August 13, 2022 – River Taster Session 9.30- 11.30 on the River Calder Related