He was the great grandson of the Liberal prime minister William Ewart Gladstone, and brother of Sir William Gladstone, 7th Baronet.
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In 1978, Sir William's younger brother, the naturalist Peter Gladstone, re-decorated Fasque, apparently whitewashing almost every wall surface himself, and opened it to the public for the first time in the September of that year, partly capitalising on the then-current popularity of the TV show Upstairs Downstairs.