Colonial and Auxiliary English troop Suggestions

West Country Mariners - Pirates recruited into military service. As naval warfare was based around archery at this time, they could be a low disciplined longbow unit. (their first appearance was in the War of the Roses)

Welsh Knifemen - Ran behind the Men-at-Arms and slit the throats of any injured enemy soldiers (nice ). Although Rome carn't really illustrate this units function, they could just be a low cost light infantry levy. (Were numerous in Edward III's armies)

Gascon Nobles - Heavy cavalry, but in small numbers. The nobles of Gascony gladly contributed to English armies before and during the HTW. They preferred to stay mounted when fighting, despite the fashion of the time.

Gascon Sergeants - Infantry from Gascony and all over the Dutchy of Aquitaine were noted for being quality pikemen. However they have been over-shadowed in history by the Swiss and to a lesser extent the Flemish.

Gascon Crossbowmen - Several sources state that Gascony provided many men armed with crossbows and were of a notable quality.

Just some suggestions.