Welcome to the Forum Dennis.
I cannot find any Military records for him on Find My Past. There is a 5162 Private D H Fraser on a medal roll for the 8th (Derbyshire) Company of the Imperial Yeomanry but his military records on Find My Past show he was Denis Hall Fraser born in Leeds.
Have found a report of his funeral in the Banbury Guardian of 24th January 1925 - the last para below is in in effect a mini obituary and whilst mentioning his time in South Africa does not mention any service in the Boer Wars.
Personally I doubt very much if he got involved in the Second Boer War and he would have been 41 when it started.
Have also found a report of his 1904 marriage in the Gentlewoman which includes individual photos of the happy couple but they are of very poor quality on line and not worth reproducing here. There is also a 1922 article in the Banbury Guardian reporting they are about to leave for SA on a business trip and how much they will be missed - Evelyn comes in for a lot of praise as she was noted for her interest in & kindness towards locals both ill and down on their luck.