Guys,
A British army is 43 figures, a Saxon army is 37, Pictish is 38, IIRC. If you play a campaign, you get individuals reinforcements or units if you win raids/battles. Individuals add to existing units till they get too big, whole reinforcement units are 4 or 6 men each. By the end of a campaign you might end up with about 60 mini's per side.
Hope this helps,
M