During the 13th century Edward the First built a series of castles along the welsh coast in order to impose his rule over the fractious natives.
The most northerly of these is Flint castle on the estuary of the river Dee, featured in this video.
When the castle was originally built the sea came right up to the walls, providing both defense and a means of resupply in the event of a siege.
But over the centuries the river Dee silted up, leaving Flint castle high and dry for most of the year.
However, every now and then when there's a particularly high spring tide the sea manages to briefly reclaim the land it lost, returning once again to wet the stones at the base of the castle.
Such was the case on this day in late September, when my wife Liz and I positioned ourselves on the earth berm overlooking the salt marsh in front of the castle to watch and film as the tide came in.
The weather was quite frisky that day, with clouds racing by overhead casting patches of sunlight and shadow over the rapidly disappearing marsh below.
What made the scene extra special was a flock of starlings performing a small murmuration over the castle walls, captured on this clip.
As well as shooting this real time video, I also shot two time lapse sequences, Flint Tide Timelapse #1, showing the tide covering the ground in front of the castle, and Flint Tide Timelapse #2, showing the marsh grasses re-emerging from under the sea as the tide ebbed.
All things considered, a couple of hours well spent!
Filename - flint castle 01
Camera - Canon EOS 6D
Lens - 24-105mm zoom
Exposure - Aperture and ISO selected to allow 1/60 sec shutter speed.
Filters - Polarising filter used to reduce glare and enhance colours. 2 stop neutral density graduated filter used to reduce the brightness of the sky.
Location - Flint, North Wales
This clip - HD 720p, 30fps (1080p HD format also available)
Clip duration - 33 seconds
All content copyright © Howard Litherland 2009-2019 unless otherwise stated.