The 2nd VB of the LNLR did not go to South Africa as a unit. Its members volunteered for service with other units. I cannot find him on the LNLR medal roll so he probably served with another regiment. G8079 may be his company and number for the 2nd VB, so he would have been given a different number for South Africa.
The easiest thing to do is to look on Findmypast as they may have created a new set of papers for him. If you do not have access to FindMyPast you should post details of his place of birth, age etc so others can confirm they have the right man.
Can you post details (or a photograph) of the plaque so we can see the other men listed. You can also look in the local newspapers as I am sure details of men volunteering would have been included.
Ken
Paul, thank you for the link, I've bookmarked it to go through

Ken. On FindMyPast I put in his name and the G8079 number and it just gave me a ref to WO127 at the National Archives, nothing else. I do have a photo of the plaque - I shall try and scan it in, but it might get tomorrow before I can have access to a scanner. The local newspapers is a good idea (hadn't thought of that...d'oh!). But I will do a scan!
His details were as per my first post. William Dwyer G8079 Corp. He was born in Kildare, Ireland in 1860ish and lived at the time of this conflict either at 5 Hemfield Street, Ince, Wigan or 10 Hall Street, Ince Wigan.
Thank you all for your time and help thus far.