He was the son of George Blakiston and his wife Elizabeth Kay, daughter of Matthew Kay. He was an Alderman of London from 1750 to 1769, was elected Sheriff of London in 1754 and became the 442nd Lord Mayor of London in 1761.
He was the son of George Blakiston and Elizabeth Kay, daughter of Matthew Kay. He served as an Alderman of London from 1750 to 1769, was chosen as Sheriff of London in 1754, and became the 442nd Lord Mayor of London in 1761.