In tomorrow's episode of Blue Planet II 'Coasts' - you'll see some coastal timelapses - filmed around Vancouver Island by myself and @danbeecham. The most ambitious of which required this bespoke, and very heavy, piece of motion-controlled kit. It was designed to shoot underwater timelapse at the bottom of the sea and we named her 'Maggie' - the Iron Lady!Maggie helped us to capture the ebs and flows of rock-pool life. It took us weeks, and many attempts to get the tides, the weather and the sun all perfect. #BluePlanetII #Timelapse #Underwater #Coast #BBCEarth #EarthOnLocation #Filming