Originally Posted by element
If memory serves correct the britons get chariots.. Use them to full advantage to flatten the romans.. then follow with a full scale infantry charge.. or pin the roman front with infantry and follow with chariot/cav to the flank.
In other words, just try to keep the romans from rolling over your weeker units for a couple minutes while you position faster cav to hit them from the sides and rear. You will have to use more tactics to beat the romans than the romans will need to beat you.