This isn't what you asked for Chris but I thought you may find this of interest !!
Soon after the onset of the South African War on 11 October 1899, it became obvious to the British authorities that the Royal Army Medical Corps would not be able to cope with the numbers of casualties from battle and disease. A call went out for volunteers from the St John Ambulance Brigade to serve for six month tours in South Africa; these personnel would mainly be posted to base hospitals, thus freeing RAMC members for service at the front.
Volunteers came forward in large numbers and, after being equipped at the headquarters in Cripplegate, London, the first batch of 23 St John Ambulance Brigade members sailed for South Africa on 3 November 1899 aboard the HMS Princess of Wales. Thereafter groups of SJABs (or 'Johnnies' as they were known) were mobilised for South Africa, and approximately 1 800 served during the period 1899-1902. About 60 of these young men died in South Africa, the majority from enteric (typhoid) fever, which they contracted from their patients. This number is imprecise, as some members lost their lives while serving with the Royal Army Medical Corps, or with other units, during second tours of duty or following discharge in South Africa.
The SJABs who served in South Africa were awarded a bronze medal which bore the uncrowned head of Edward VIII. Their service numbers, ranks, initials, names and units were engraved on the rim in large block letters. The silver Queen's South Africa Medal was also awarded with details impressed on the rim and the unit shown as 'St John Ambulance Brigade'. Both medals were awarded posthumously and a few examples, which were awarded to casualties, have appeared in medal dealers' catalogues during the last decade.
http://rapidttp.com/milhist/vol105de.htmlif he was active with St John's Ambulance - maybe they would have some information regarding your J Grimshaw !! at least you could check it out while you're waiting to see if anybody can help !!
http://www.sja.org.uk/sja/Annie
