Afterwards, he was given livery of the rest of his lands, was one of the knights admitted at the foundation of the Order of the Garter,[1][2] and was summoned to parliament as a baron both in 1348.

Also in 1355, he received a number of important appointments, including Constable of Dover Castle and Warden of the Cinque Ports, and he accompanied an expedition of Edward III to France.

In the following years, he became a member of the Royal Council and was appointed Constable at the castles of Montgomery, Bridgnorth in Shropshire, and Corfe in Dorset.

The English forces then moved into Burgundy, where Roger died suddenly at Rouvray, near Avallon.

Roger married Philippa de Montagu (1332–1381), daughter of William Montagu, 1st Earl of Salisbury, and Catherine Grandison and had by her at least four children: Mortimer also had at least one illegitimate child:[6] Heraldic Coat of Arms: Barry Or and azure, on a chief of the first three pallets between two gyronnies based on the second, over all an inescutcheon argent.