The High School of Glasgow is a private, co-educational day school in Glasgow, Scotland. The original High School of Glasgow was founded as the choir school of Glasgow Cathedral in around 1124, and is the oldest school in Scotland, and the twelfth oldest in the United Kingdom. On its closure as a selective grammar school by Glasgow City Corporation in 1976, it immediately continued as a co-educational independent school as a result of fundraising activity by its Former Pupil Club and via a merge by the Club with Drewsteignton School. The school maintains a relationship with the Cathedral, where it holds an annual service of commemoration and thanksgiving in September. It counts two British Prime Ministers, two Lords President and the founder of the University of Aberdeen among its alumni.

Field Marshal Colin Campbell, 1st Baron Clyde,, was a British Army officer. After serving in the Peninsular War and the War of 1812, he commanded the 98th Regiment of Foot during the First Opium War and then commanded a brigade during the Second Anglo-Sikh War. He went on to command the Highland Brigade at the Battle of Alma and with his "thin red line of Highlanders" he repulsed the Russian attack on Balaclava during the Crimean War. At an early stage of the Indian Mutiny, he became Commander-in-Chief, India and, in that role, he relieved and then evacuated Lucknow and, after attacking and decisively defeating Tatya Tope at the Second Battle of Cawnpore, captured Lucknow again. Whilst still commander-in-chief he dealt with the "White Mutiny" among East India Company troops, and organised the army sent east in the Second Opium War.