Coberley’s parentage and regional provenance have not been established, although his surname may suggest that his family originally hailed from Gloucestershire. What seems clear is that he received some training in the law, and by the late 1430s was practising as an attorney in the Westminster common law courts.
It is not clear why or how Thomas secured election for the borough of Hindon, belonging to the recently consecrated Bishop Waynflete, to the Parliament that assembled at Westminster that autumn, but it is just possible that he was minded to bring his troubles before the Lords and Commons, for he for his part now challenged Lacon (who had also been returned to the Parliament) before the King’s justices of common pleas.
Few other details of Coberley’s career have come to light, but it is possible that he was the man who in May 1463 was appointed to a royal commission set up to inquire into the Kentish landholdings of the duke of York. He is not heard of thereafter.
