Beachcombing Finds Along the Holderness Coast

A Coastline That Gives and Takes

Stretching from the chalk cliffs at Flamborough Head down to the long curl of Spurn Point, the Holderness coast is one of the fastest-eroding stretches of shoreline in Europe. On average it retreats a metre or two a year, and a single winter gale can shift many metres of boulder clay in an afternoon. That constant loss is precisely what makes it such an absorbing place to beachcomb: the sea is forever opening a cupboard that was sealed thousands of years ago and laying its contents out along the tide line.

The cliffs here are glacial till, dumped by ice sheets and packed with whatever those ice sheets scraped up on their way. The result is a beach that turns over its stock with every storm, and a stretch of coast where a keen eye can find something genuinely unusual within an hour. The best window runs from November to March, and the best conditions follow a north-easterly gale, when the swell has had a clear run at the cliffs for a day or two.

The Winter Harvest: Glass, Coal and Jet

Sea glass is the gateway find, and the Holderness beaches produce it generously. The clay contains old rubbish tips, long since fallen into the sea, and the glass inside them has been tumbled for decades into soft, frosted pebbles.

• Common colours: white, pale green and brown, mostly from bottles and jars.
• Less common: cobalt blue, aqua and pale pink, usually from medicine or cosmetic bottles.
• Genuinely rare: deep red, orange and milk white, often Victorian in origin, and worth a small cheer when one turns up.

Search the gravel ridges rather than the flat sand. Sea glass sits where the finer material has been winnowed away, so look along the crests of shingle banks and in the hollows between them. Sea coal is another staple: glossy black lumps that have washed out of undersea seams and old wrecks.

If you find a stone that feels surprisingly light, is warm to the touch and leaves a brown streak on paper rather than a white one, you may be holding jet. Amber is rarer still, honey-coloured and translucent, and it will float in salt water, which is the quickest way to tell the two apart.

Fossils and the Erratics

This is where the Holderness coast gets interesting. Almost every fossil found here is an erratic, carried south by ice from somewhere else entirely rather than laid down on the spot.

• Belemnites: bullet-shaped guards, the internal skeletons of squid-like creatures, often grey or golden brown and unmistakable once you have seen a few.
• Ammonites: frequently flattened and fragmentary, but complete examples do appear, usually in dark limestone.
• Sea urchins and crinoid stems: common in flint and chalk, and lovely when the pattern is sharp.
• Chalk erratics: brought from the Wolds, sometimes containing shells or the odd fragment of bone.
• Igneous and metamorphic pebbles: basalt, granite and gneiss from Scotland and Scandinavia, plus flint and Carboniferous limestone packed with coral.

The golden rule is to check the stones you would normally walk past. Wet them, turn them over, and look for patterns that repeat.

Reading the Beach

Timing and position matter more than luck. Go on a falling tide, ideally arriving an hour or two before low water, and work the strandline left by the previous high tide before the sea reaches it again. The richest ground is usually the gravel shelf just below the cliff base, where heavier material collects, and the side of any groyne that faces the drift, which acts as a trap.

The archaeology of lost villages adds another layer of interest, and old brick, pantiles and hand-made pottery shards still appear along this coast. They are usually easy to distinguish from natural stone once wet: look for straight edges, uniform thickness and a dull ring when tapped.

Kit, Tides and Staying Safe

The cliffs are soft, the mud is deep and the tides move faster than most people expect.

• Wear: wellies with proper grip, and gloves for handling glass and sharp metal.
• Carry: a tide table, a flask, a torch, a bucket or sturdy bag, and a phone in a waterproof pouch. Signal is patchy in places.
• Avoid: walking directly beneath the cliffs, and never dig into the clay face. Fresh falls happen without warning and the mud is unforgiving.
• Take care: at Spurn, where the peninsula is cut off at high water, and on any beach with soft mud or newly formed channels.
• Tell someone: where you are going and when you expect to be back.

The Beachcombing Code

Take only what you will use, study or display, and leave the rest for the next pair of eyes. Fill a bag with litter on your way back, and keep dogs away from the cliff edge and any soft mud.

If you come across anything that looks like wreck material, an archaeological object or human remains, mark the spot, note the grid reference and report it rather than carrying it home.

Above all, enjoy the strangeness of it. The Holderness coast is a place where a Norwegian granite pebble, a Victorian medicine bottle and a 150-million-year-old ammonite can all end up in the same square metre of shingle, and tomorrow the sea will rearrange them again.