Hi Shannon, welcome aboard. WO 100/279 is a reference to the Queen's South Africa Medal (QSA) roll. 279 being Natal Government Railways in Colonial Officials. Maintenance Engineer L Brereton is listed in WO 100/279 on page 208 as entitled to the QSA. The page is dated 24 June 1904 in Durban. The official that signed it appears to be a Da? Hunter. And under remarks for Brereton is noted "At Intombi Camp during siege." If you need a copy of the page send me a PM with your e-mail address and I'll send it to you.
WO 100/261 pg 213 lists 137 Seaman Arthur Spence, Adams Natal Naval Volunteers as QSA with Tugela Heights and Relief of Ladysmith clasps.
There are LC Adams and CS Adams listed on the rolls for the Natal Mounted Rifles. Both are listed as entitled to the QSA on WO 100/260 pg 13. CS Adams is listed as a Lieut and it is noted he served as a Capt in the Volunteer Composite Regiment. The page is badly damaged so clasps are difficult to see clearly but it appears he got Laing's Nek, Defence of Ladysmith, Elandslaagte, OFS and Transvaal clasps. LC Adams is listed as a Lieut and it is noted he also served as a Capt in the VCR. His QSA clasp entitlements seem to be Laing's Nek, Defence of Ladysmith and Elandslaagte. Both men are listed on WO 100/363 pg 183 as being entitled to the King's South Africa Medal (KSA) with South Africa 1901 and 1902 clasps.
Cheers,
Mark