Hickey’s Memoirs included a picnic luncheon in Westminster Abbey during the coronation of George III in September 1762. His memory of the coronation is humorous if it’s true. Many of Hickey’s memories are lascivious, and he was regarded as a rake. 
Hickey’s father rented a Nunnery, a viewing stand for twelve, in front of a column in the Abbey. The family arrived at about 7:00 AM and was served a hot breakfast. The picnic luncheon was eaten just after the ceremony as soon as the king and queen were invested. Hickey’s family was not alone, and he remembers that the Abbey was filled with the sounds of eating: “general clattering of knives, forks, plates, and glasses that . . . produced a most ridiculous effect, and a universal burst of laughter.”
Provisions included cold fowls, ham, tongues, and an assortment of meat pies, wines, and liquors.
See William Hickey. “Boyhood.” In Memoirs of William Hickey. Edited by Alfred Spencer. London: Hurst & Blackett, 1913. (Composed 1808-1810 but not published until 1913-1925.)