Brigade Games ( http://www.brigadegames.com/ ) has added new 1799 British figures to their range. Seperate heads are available which is a nice idea. They are in the later pattern uniform with front closed coat so afaik they are not useable for the earlier 1792-1795 period or for the 1799 landings in the Netherlands but I always welcome a new addition to this period.
Planned additons to this range by Brigade Games are French Cavalry of which pictures can be seen in their forum. Some pictures of thes figures are under represented.
In my opinion these look great. So go to the Brigade Games forum.
Although the figures are for the 1799 Italian/Swiss Campaign of Kutusov, these can of course be used for the Anglo-Russian landings in the Netherland against the Batavian Republic which also took place in 1799.
Only a small group of cossacks took part in the landings. According to Geert van Uythovens' great book "Voorwaarts Bataven"(or "forward Batavian" for those no-Dutch speaking readers) the cossack contingent consisted on september 18th 1799 of: