Colonel Robert Stuart Macrae TD was an inventor best known for his work at MD1 during the Second World War, his best known invention being the sticky bomb.

Also known as "Winston Churchill's Toyshop", this was a British weapon research and development organisation of the Second World War.

Following an air raid, a large country house "The Firs", (fortunately the second home of a patriotic Major) was requisitioned and the design and workshops relocated there, in Whitchurch near Aylesbury in Buckinghamshire close to the Prime Minister at Chequers.

With the end of the war and the removal of Churchill from office, MD1 was taken over by the Ministry of Supply and the Weapons research establishment at Fort Haldane with the result that it was disbanded.

Jefferis received an appointment to the Pakistan Army.https://www.staybehinds.com/origins-md1-winston-churchills-toyshop Macrae was the author of Winston Churchill's Toyshop, a memoir detailing his experiences at MD1.

Macrae had been a trainee engineer and late in the First World War worked on a device for dropping grenades as an early form of cluster bomb.

[9] He was promoted to substantive lieutenant colonel on 1 July 1950,[10] and awarded the Territorial Efficiency Decoration, with clasp on 15 June 1951.

Matters came to light as he again applied to the Royal Commission on Awards to Inventors for his wartime work on a variety of gadgets.

He explained that he had taken the papers home for safe keeping when The Firs closed in 1947 because no one else would take them away and they were left lying on the workshop floor[12] and he was soon exonerated of any wrongdoing.

[15][16] In 1971, Macrae published the book "Winston Churchill's Toyshop," detailing his work at MD1, one of the most famous and successful of all the British secret "back rooms" of World War II.

[17] It produced an astonishing variety of ingenious and secret weapons that destroyed innumerable German tanks, aircraft and ships.

[19] The following year, Macrae and his new wife attended a luncheon party given by Queen Elizabeth II on the Royal Yacht Britannia.