Editing Dunstanburgh Castle (section)

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| footer = The Great Gatehouse (left), inspired by the gatehouse at [[Harlech Castle]] in North Wales (right)<ref name="Oswald 2011 5"/>
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Thomas of Lancaster made little use of his new castle; the only time he might have visited it was in 1319 when he was on his way north to join Edward's military campaign against Scotland.<ref name="oswald27"/> [[Despenser War|Civil war]] then broke out in 1321 between Edward and his enemies among the barons. After the initial royalist successes, Thomas fled the south of England for Dunstanburgh in 1322, but was intercepted en route by Sir [[Andrew Harclay]], resulting in the [[Battle of Boroughbridge]], in which Thomas was captured; he was later executed.<ref name="Oswald 2011 29">{{harvnb|Oswald|Ashbee|2011|p=29}}</ref>

The castle passed into royal control, and Edward considered it a useful fortress for protection against the threat from Scotland.<ref name="Oswald 2011 29"/> Initially it was managed by [[Robert de Emeldon]], a merchant from Newcastle, and protected by a garrison of 40 men at arms and 40 light horsemen.<ref>{{harvnb|Blair|Honeyman|1955|p=6}} for merchant bit</ref> Roger Maduit, a politically rehabilitated former member of Thomas's army, was appointed as [[constable]], followed by Sir [[House of Lilburn|John de Lilburn]], a Northumberland ''schavaldour'' in 1323, who was in turn replaced by Roger Heron.<ref>{{harvnb|Oswald|Ashbee|2011|p=30}}; {{harvnb|Cornell|2006|p=108}}</ref>

Maduit and the castle's garrison took part in the [[Battle of Old Byland]] in North Yorkshire in 1322, and the garrison was subsequently increased to 130 men, predominantly light horsemen, and formed a key part of the northern defences against the Scots.<ref>{{harvnb|Cornell|2006|pp=8–9, 20–21, 260}}</ref> By 1326, the castle was given back to Thomas's brother, [[Henry, 3rd Earl of Lancaster]], with Lilburn returning as its constable, and continued to be of use in defence against the Scottish invasions over the next few decades.<ref>{{harvnb|Oswald|Ashbee|2011|p=27}}; {{harvnb|Cornell|2006|p=108}}</ref>