His brother, Sir William Cain, 1st Baronet, was also heavily involved in the business.
Apart from his business career Brocket was also a Deputy Lieutenant and High Sheriff of Hertfordshire (1925) and a Justice of the Peace for the county and was involved in charitable causes.
In 1921 he assumed by deed poll his wife's maiden surname of Nall in addition to that of Cain.
Lord Brocket died in November 1934, aged 68, and was succeeded in his titles by his son from his first marriage, Ronald Nall-Cain.
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