An all-round sportsman, he was also a capable swordsman, and polo, tennis, racquets, and squash player, in addition to being a skilled marksman.

In this role, he played an important part in investigating and recording the war–crimes trial and execution of Breaker Morant and Peter Handcock.

[1] From India, he proceeded with the 7th Hussars to South Africa,[1] where he served in the Second Matabele War in neighbouring Rhodesia from 1896 to 1897.

[11][6] In this capacity, Poore commanded the military police and was responsible to the commander-in-chief, Lord Roberts, and his successor in 1902, Earl Kitchener.

[13] He saw action in the Orange Free State, where he took part in the battles of Paardeberg, Poplar Grove, Driefontein, Vet River, and Zand River; he subsequently saw action in the Transvaal, where he took part in engagements at Pretoria and Diamond Hill, and later in August 1900 in Western Transvaal at Bergendal.

[18] As provost marshal, Poore was the lead investigator into the war–crimes allegations against Breaker Morant and Peter Handcock,[19][20] which led to their trial and execution in February 1902.

[12] In the diary he puts forth his belief that Moran and Handock not only executed prisoners of war, but also murdered a German missionary who witnessed the killings.

[35] He subsequently made four further first-class appearances for the Europeans across the 1894–95 and 1895–96 Bombay Presidency Matches,[35] which included a maiden century in the latter.

[7] His form led to him being called up to the South African team, with him featuring in three matches against England in February–March 1896;[7] these were subsequently afforded retrospective Test status.

[33] Following the Test, there was talk of Poore playing for Natal in the 1895–96 Currie Cup, but the competition was called off due to unrest.

[40] His time spent playing on hard wickets in India and South Africa early in his career is credited with developing and refining his batting style.

[43] The following season, Poore was the highest first-class run-scorer in England, scoring 1,399 runs (including seven hundreds) between 12 June and 12 August at an average of 116.58.

[46] Poore's innings was described by the Southern Daily Echo as being "a remarkable feat of physical endurance" on "a sweltering July day".

[43] After missing the 1905 season due to his military commitments in South Africa,[53] Poore played in two matches in the 1906 County Championship,[35] scoring a century (129) against Sussex at Chichester.

[57] Later, while serving in India in 1912 and 1913, he made two final appearances in first-class cricket for the Europeans,[35] with Poore scoring a half century in the 1912 fixture against the Parsees.

[59] His great height, while benefitting his batting, was noted to be a hindrance to him when fielding, with Poore sometimes finding it difficult to get down to the ball.

[60] After the cessation of his first-class career, Poore remained a dangerous batsman in club games right up to his mid-fifties, scoring three consecutive fifties during an MCC tour of the West Country in 1923.

[34][26] Cricket was not the only field in which Poore's sporting talents lay: he was considered a brilliant swordsman, and polo, tennis, racquets, and squash player, in addition to being a capable marksman.

[61][14] As a swordsman, Poore was adjudged to have been the best man-at-arms in the 1898, 1899, 1906, and 1907 Royal Naval and Military Tournaments;[7] his success was attributed to the enormous reach of his arms which had suited him so well as a cricketer.

[1] In 1898, Poore married Lady Flora Mary Ida Douglas-Hamilton, daughter of Captain Charles-Douglas-Hamilton, and sister of the 13th Duke of Hamilton.

[7] In 1925, Poore constructed a house on land purchased from Lord Wimborne's estate, Rose Lawn Coppice, in Ashington, Dorset.