Mark, If you're talking specifically about the Battle of Mons on 23 Aug 1914, then 2/KRRC (2 Bde, 1st Div) were not directly in action.  From their Battalion War Record in the 1914 KRRC Chronicle, it seems this was also true for the whole division.   On the night of 22/23 Aug they moved from ST REMY-MAL-BATI (17:30hrs) through MAUBEUGE to VILLER-SIRE-NICOLE (22:30hrs) where they had a short rest.   At 04:10hrs they set off again to a position just to the SW of ROUVEROY.