Thanks for the comments.
I am planning on this being a complete army in its own right Robert, with around twenty battalions and three regiments of cavalry, but will no doubt be spreading it across a few British brigades for gaming purposes as well.
I like Front Rank even though they are very large (especially the pre-reinforcement pack figures), but they are still my default figure of choice. It' s funny Gustav as I agonised over whether to just do them in one battalion combined regiments as you have done and am still not 100% sure I went the right way, but I suppose I can always remove a few figures to combine and shrink them down on the table if needs be. I am just hoping that my motivation doesn't waver before I manage to complete them.