Sir Alan Frederick "Tommy" Lascelles, (; 11 April 1887 – 10 August 1981) was a British courtier and civil servant who held several positions in the first half of the twentieth century, culminating in his position as Private Secretary to both King George VI and Queen Elizabeth II. In 1950, he wrote the Lascelles Principles in a letter to the editor of The Times, using the pen-name "Senex". Early life and education Lascelles was born on 11 April 1887 in the village of Sutton Waldron in Dorset, England, the sixth and youngest child and only surviving son of Commander Frederick Canning Lascelles and Frederica Maria Liddell, and the grandson of Henry Lascelles, 4th Earl of Harewood. He was thus a cousin of Henry Lascelles, 6th Earl of Harewood, who married Mary, Princess Royal, sister of his employers, Edward VIII and George VI. His mother was the daughter of Sir Adolphus Liddell, son of Thomas Liddell, 1st Baron Ravensworth. After attending Marlborough College, followed by Trinity College, Oxford, Lascelles served in France with the Bedfordshire Yeomanry during the First World War, where he rose to the rank of captain and was awarded the Military Cross, after which he became aide-de-camp to his brother-in-law Lord Lloyd, the Governor of Bombay from 1919 to 1920. Career Lascelles then returned to Britain and was appointed Assistant Private Secretary to Edward, Prince of Wales, in 1920, serving in that role until resigning in 1929, citing differences with the prince. From 1931 to 1935, he was Secretary to the Governor General of Canada, Vere Ponsonby, 9th Earl of Bessborough. Lascelles became the Assistant Private Secretary to George V in the latter months of 1935. When the Prince of Wales ascended the throne as Edward VIII on the death of George V in January 1936, Lascelles served briefly as the new King's assistant private secretary. Then, when Edward VIII abdicated in December 1936, Lascelles became assistant private secretary to George VI, some time after the new king's accession. Lascelles was knighted by George VI, while aboard a train, during the moderately successful 1939 royal tour of Canada and the United States, which he had helped to arrange and manage; the King made him a Knight Commander of the Royal Victorian Order (KCVO) which is an honour in the personal gift of the sovereign and does not require political approval. He had been appointed a Companion of the