[4] Made Ambassador to the Ottoman Empire and elected the representative of the Levant Company on the nomination of King George I on 10 May 1716, Montagu arrived with his wife at Adrianople (now known as Edirne) on 13 March 1717.

In 1726 Montagu was a signatory, with his father, to the document creating the Grand Allies coal cartel in North East England.

[5] Coal-related business had been a preoccupation for him since about 1709: he was included in meetings from about that time of an earlier coal cartel to which his father belonged.

Montagu remodelled Wortley Hall, where in 1743 a design by Giacomo Leoni for the south front was carried out.

[9] Work by Platt continued after Montagu's death, with the West Wing added for his daughter Mary in the 1780s.

On his death, he left the hall and a large fortune to his daughter Mary, having in 1755 cut off his son Edward with only a small allowance.