The History of Seaham

The ancient Church of St Mary in "Old Seaham" — situated on the clifftop above the modern town — dates from the 8th century, making it one of the oldest intact churches in County Durham. Its Saxon origins are visible in the distinctive stonework. The churchyard contains graves stretching back many centuries, and the site commands breathtaking views over the North Sea. Seaham itself is first recorded in writing in 1050 AD, but the settlement around St Mary's is older. The church remains an active parish church today and is well worth a visit.

The handsome Seaham Hall was built in the 1790s by Sir Ralph Milbanke, 6th Baronet, as a grand country house on the Durham clifftop. With its elegant Georgian architecture and coastal views, it attracted the very best of North East society. The Milbanke family was socially ambitious, well-connected, and one of the most prominent in the county. Their daughter, Anne Isabella — known as "Annabella" — was regarded as one of the most eligible and intellectually distinguished young women of her generation. She was also to be the bride of the most famous poet in England.

In the autumn of 1814, the poet George Gordon Byron — Lord Byron, author of Don Juan, Childe Harold's Pilgrimage, and one of the most celebrated men in Europe — arrived at Seaham Hall to court Annabella Milbanke. He walked the clifftop paths above the North Sea (Byron's Walk is named for him to this day) and wrote seven of his Hebrew Melodies in the Hall. The wedding took place on 2 February 1815 in the upstairs drawing room. Byron reportedly described his honeymoon as a "treaclemoon." The marriage lasted barely a year — the couple separated in January 1816, and Byron never returned to England. Their daughter, born in December 1815, was Ada Lovelace — mathematician, visionary, and the woman now celebrated as the world's first computer programmer.

In 1821, Charles Vane, 3rd Marquess of Londonderry purchased the Seaham estate for £63,000 through his wife Lady Frances Vane-Tempest, one of the greatest heiresses of the era — with nearly 65,000 acres and vast coal reserves to her name. The Londonderrys would transform Seaham from a quiet clifftop village into a significant industrial harbour town. The family name lives on throughout the area — in Vane Tempest Colliery, in the Vane Tempest car park, and in the very character of the town the Marquess built.

Lord Londonderry's great ambition was to ship coal from his inland County Durham collieries directly from a new harbour, rather than paying the owners of Sunderland's port. He commissioned engineers to build an entirely new harbour at Seaham and a new railway — the Rainton and Seaham Railway — to connect his collieries. Construction was a remarkable feat for the period. On 25 August 1831, the first cargo of coal was shipped from the North Dock aboard the brig Lord Seaham, amid cannon fire and 5,000 spectators. The harbour was extended and deepened several times over the following decades, with the expanded dock officially opening in 1905. Seaham Harbour is notable for its series of interconnecting locks — an unusual design reflecting the challenging tidal conditions of this stretch of the Durham coast.

In 1852, glassmaker John Candlish was granted a lease to build a bottle works on the clifftops. By its peak, the Londonderry Bottle Works was the largest bottle factory in Europe — seven bottle houses, 20,000 hand-blown bottles per day, its own railway and fleet of ships. Every evening, waste glass was tipped from the cliffs directly into the North Sea. John Candlish — who became Mayor and MP for Sunderland — was a progressive employer, building housing, a school, a chapel, and a library for his workers. The factory finally closed in 1921, made uneconomical by machine-made bottle production. Those 70 years of daily glass-tipping are the reason Seaham Beach is unique today.

Three collieries defined modern Seaham: Seaham Colliery (affectionately known as "the Knack"), Dawdon Colliery, and Vane Tempest Colliery. At their peak, they drove massive population growth, drawing thousands of workers and their families to the town and the surrounding villages. The collieries shaped everything — the culture, the community, the terraced streets, and the tight-knit identity of the town. Mining was dangerous, physically brutal work, and Seaham's miners paid a heavy price over many generations. Coal dominated the town's economy until it didn't.

The 1984–85 miners' strike — one of the most bitter industrial disputes in British history — hit Seaham particularly hard. The community was fractured, families divided, and the town's economic foundations undermined. By the end of the strike, the closures accelerated. Dawdon Colliery closed in 1991. Vane Tempest followed in 1992. By the early 1990s, every pit had gone. The loss was devastating — not just economic, but cultural and psychological. An entire way of life disappeared within a few years. Seaham spent much of the 1990s in severe economic depression.

Seaham has spent the 21st century rebuilding its identity. Seaham Hall was transformed into a prestigious five-star hotel and spa. The town centre was redeveloped around Byron Place — the shopping complex named in honour of the literary connection. The seafront was regenerated. In 2014, Ray Lonsdale's Tommy arrived on Terrace Green and became a symbol of the town's pride and community spirit. Tourism, particularly sea glass hunting, has grown into a significant draw. The Durham Heritage Coast has been recognised as one of the finest stretches of undeveloped coastline in England. Seaham is a town finding its feet — with one eye firmly on its remarkable past.