Dunbar

The 25 Pounder Gun at the Glebe Dunbar on the Geograph website . The Ordnance QF 25-pounder, or more simply 25-pounder or 25-pdr, was the major British field gun and howitzer during the Second World War, possessing a 3.45-inch (87.6 mm) calibre. It was introduced into service just before the war started, combining high-angle and direct-fire, relatively high rates of fire, and a reasonably lethal shell in a highly mobile piece. It remained the British Army's primary artillery field piece well into the 1960s, with smaller numbers serving in training units until the 1980s. Quoted from Wikipedia

Dunbar is a town on the North Sea coast in East Lothian in the south-east of Scotland, approximately 30 miles (50 kilometres) east of Edinburgh and 30 miles (50 kilometres) from the English border north of Berwick-upon-Tweed. Quoted from Wikipedia

Dunbar Castle was one of the strongest fortresses in Scotland, situated in a prominent position overlooking the harbour of the town of Dunbar, in East Lothian. Several fortifications were built successively on the site, near the English-Scottish border. The last was slighted in 1567; it is a ruin today. Quoted from Wikipedia