Something of a surprise - I recently spotted four lots of unidentified Highlanders on ebay. as sole bidder on all four lots I was glad when they arrived and confirmed my conviction that these were in fact more Grove & Benoy figures. I wasn't aware of there being any Highlanders before and they include sergeants, officers, ensigns (missing flags), a band (some missing instruments), drummers and pipers, and masses of marching rank and file. I will try to get better photos when the light improves.
You can access earlier posts on Grove and Benoy here.