Plain red bunting

The not very flamboyant arms of Amanieu VII d'Albret, another Gascon exile in English service at Falkirk. 

Amanieu was the head of the Albret, one of the oldest families of Plantagenet Aquitaine. Stemming from the poor and insignificant lordship of Labrit, they steadily built up their holdings via marriage and purchase. Both Henry III and Edward I were careful to cultivate the loyalty of the Albret, now one of the most powerful Gascon lineages in the northern part of the duchy. The Albret in turn held true to the Plantagenets: Amanieu VII was especially loyal and served Edward in France and Scotland. He is briefly mentioned in the Song of Caerlaverock, otherwise a praise piece for English knights.

The loyalty of the Albret, so painstakingly built up over decades, was thrown to the winds by Edward II. Edward chose to favour the Gaveston faction, Amanieu VII's hereditary enemies. In 1310 Amanieu was expelled from his lordship of Nérac by Piers Gaveston's older brother, and appealed to Philip le Bel for justice. In his appeal Amanieu complained the Gavestons were conspiring to compromise Edward II's honour by giving away Gascon lands and offices to unsuitable candidates. Edward's response was to appoint John de Ferrers as seneschal of Gascony: John murdered several of Amanieu's kinsmen and had others arrested and mutilated. Amanieu raised an army against the seneschal and was probably responsible for his poisoning in 1312. This once-loyal supporter of the Plantagenet regime then defected to the French.

At Falkirk Amanieu seems to have fought all on his lonesome, holding his plain red flag.