NO.74

The grenade, hand, anti-tank No. 74, commonly known as the S.T. grenade[a] or sticky bomb, was a British hand grenade designed and produced during the Second World War. The grenade was one of a number of anti-tank weapons developed for use by the British Army and Home Guard as an ad hoc solution to a lack of sufficient anti-tank guns in the aftermath of the Dunkirk evacuation. Designed by a team from MIR(c) including Major Millis Jefferis and Stuart Macrae, the grenade consisted of a glass sphere containing an explosive made of nitroglycerin and additives (this added stability to the mix, as well as giving it its squash-head-like effect) covered in a strong adhesive and surrounded by a sheet-metal casing. When the user pulled a pin on the handle of the grenade, the casing would fall away and expose the sticky sphere. Pulling another pin would arm the firing mechanism and the user would then attempt to attach the grenade to an enemy tank or other vehicle. Letting go of the handle would release a lever that would activate a five-second fuse, which would then detonate the nitroglycerin.

https://en.m.wikipedia.org/wiki/Sticky_bomb

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] Macrae's book traces his work at the "toyshop," from the limpet mine, a delayed action mine, to the sticky bomb and the Blacker Bombard, to giant, bridge-carrying assault tanks (the Great Eastern).[17] The workshop operated initially out of a tiny basement workshop and later from a country mansion.[17] It produced an astonishing variety of ingenious and secret weapons that destroyed innumerable German tanks, aircraft and ships.[17]

https://en.m.wikipedia.org/wiki/Stuart_Macrae_(inventor)

notice the [17] footnote referring to secret back room with ChurchHill which housed the creation of secret and ingenious weapons to destroy the Nazis

>>6964929

“Irregular Warfare”

MD1 began in "Military Intelligence Research" (MIR). MIR was a department of the War Office set up in 1939 under Lt-Col Joe Holland RE. Holland was the General Staff Officer Grade 1 (GSO1) and brought in Jefferis, also a Royal Engineers sapper and explosives expert, with experience in India, as GSO2 to head MIR(c) a division of MIR that was to develop weapons for irregular warfare. Needing special magnets, Jefferis brought in Macrae initially as an outside contractor but later to be brought into uniform and serve as his deputy. Between them they produced the limpet mine, a timed explosive that could be stuck to the underside of a ship.

MIR(c) started in a room at the War Office, Macrae initially secured offices and workshop space at IBC, owners of Radio Normandie, in London. Macrae soon also secured all the staff, including Norman Angier who continued as Assistant Director and senior civilian member of the staff throughout the 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.[1] There they developed and to some extent produced munitions.

https://en.m.wikipedia.org/wiki/MD1_(military_R%26D_organisation)