Ka kammala wannan jumla: A shekaru da suka biyo baya, Montagu ya zama abokin Edward na kud da kud. A watan Afrilu na shekara ta 1331, su biyun sun tafi balaguron asiri zuwa Faransa, sun yi kama da 'yan kasuwa don kada a gane su. A watan Satumba na wannan shekarar, Montagu ya gudanar da gasa a Cheapside, inda shi da sarki suka yi kama da Tatars. Daga 1333 zuwa gaba, Montagu ya tsunduma sosai a cikin
Yaƙe-yaƙe na Scottish, kuma ya bambanta kansa a Siege na Berwick da Battle of Halidon Hill. Bayan wannan taron ne aka amince da mulkinsa a kan Isle of Man, haƙƙin da ya mallaka daga kakansa. A wannan lokacin mulkin mallaka ya kasance na dabi'a ne kawai, duk da haka, tunda har yanzu tsibirin yana ƙarƙashin ikon Scotland.