Thomas was eventually released around 1427 in a prisoner exchange negotiated by his uncle, Cardinal Beaufort.
This was part of a continuing attempt by Cardinal Beaufort to carve out estates for his nephews from conquered French land.
During the 1430 royal coronation expedition of Henry VI, Thomas was granted a retinue of 128 soldiers and 460 archers.
He commanded soldiers at a battle at La Charité-sur-Loire in late 1430 and died 3 October 1431 at the siege of Louviers, three weeks before the city's fall.
[1] As the legitimised great-grandson of Edward III he bore his arms altered by a bordure gorbony argent and azure.