Thank you for your thoughts. I suppose it is possible that the ROM could be an error although the other entries on the same roll for those entitled to DOK and ROM appear correct. Kaplan, perhaps not surprisingly, has him on his ROM roll but only showing entitlement to ROM and OFS, so drawn from the KLH medal roll. I prefer to think he earned his ROM, as the brief period of his service with the Light Horse would fit with him having volunteered for the southern relief column but that could just be wishful thinking! Why he called himself Lewis is a mystery.
I am coming to the conclusion that "Lewis" Radcliffe was an entirely different man and has been confused on the nominal roll with J Radcliffe. Steve Watt records an LB Radcliffe of the KLH as having died in Kimberley on 2/09/00 and buried in Kimberley West End Cemetery. Sadly no regimental number given and not in the casualty roll for September 1900. I think he is also recorded on the Hull Boer War memorial as F.L.B. Radcliffe Private, Kimberley Light Horse, Died of Disease. The Anglo-Boer War Records database on ancestry has him as "F. Lewis Bradley" Radcliffe, died on the 2/09/1900. I cannot find a L Radcliffe or a FLB Radcliffe on the medal rolls so he possibly had no entitlement.