This is one of the nice regiments that can be made for the Peninsula War. The figures had to be made from Scottish heads (ESCI and Italeri) and british bodies (Esci and Revell). The bond is achieved by that miracle all plastic glue (glue+primer).
The mounted officer is the old Airfix figure on a Waterloo1815 horse.
There is also the mounted Scottish Officer from the Airfix box.