[6] Allmand was raised in a Roman Catholic family, with his father being a convert to the faith and later a Knight of the Order of St. Gregory the Great, who were parishioners at St. Edward the Confessor Church Golders Green.

[11] While at Oxford, Allmand served as the founding editor of a literary review journal called The Wind and the Rain,[12] and began writing a biography of Edmund Burke.

[13] At the end of 1942, amidst the backdrop of World War II, Allmand left university and joined the British Indian Army.

[17] They were later sent north to another stronghold dubbed "Blackpool" where they were tasked with supporting Chinese forces around Mogaung and Myitkyina under US General Joseph Stilwell, who re-roled them as conventional infantry.

[22] On 11 June, two days after 3/6 GR had reached the outskirts of the town, Allmand's platoon was tasked with capturing a road bridge about 0.25 miles (0.40 km) away from the central railway station, close to where the Japanese had established their headquarters in a building dubbed the "Red House".

[23] A short time later, another member of 3/6 GR, Tul Bahadur Pun, charged the bridge singlehandedly, killing the remaining Japanese defenders and securing it for the Gurkhas.

[26] Although he was pulled out of the line of fire by another Gurkha – Sergeant Tilbir Gurung, who received the Military Medal for his act[20] – Allmand subsequently died of his wounds early on 24 June.

[14] His Victoria Cross was awarded posthumously and was presented to his family by King George VI at Buckingham Palace on 17 July 1945, having been announced in the London Gazette on 26 October 1944.

As the platoon come within twenty yards of the Bridge, the enemy opened heavy and accurate fire, inflicting severe casualties and forcing the men to seek cover.

Captain Allmand, however, with the utmost gallantry charged on by himself, hurling grenades into the enemy gun positions and killing three Japanese himself with his kukrie.

Two days later Captain Allmand, owing to casualties among the officers, took over command of the Company and, dashing thirty yards ahead of it through long grass and marshy ground, swept by machine gun fire, personally killed a number of enemy machine gunners and successfully led his men onto the ridge of high ground that they had been ordered to seize.

Once again on June 23rd in the final attack on the Railway Bridge at Mogaung, Captain Allmand, although suffering from trench-foot, which made it difficult for him to walk, moved forward alone through deep mud and shell-holes and charged a Japanese machine gun nest single-handed, but he was mortally wounded and died shortly afterwards.