The previous Parliamentary borough of Marylebone was split up in the boundary review of 1884–85.

The new Parliamentary borough consisted of the parish of St Marylebone, and therefore had identical boundaries to the St Marylebone Vestry which was the main institution of local government.

Marylebone West division was defined as containing the Bryanston, Hamilton Terrace, New Church Street, and Portman wards.

[1] Diggle stood in order to test the eligibility of Church of England clergyman to stand as candidates, but if he had won he would have been disqualified from sitting in the Commons.

The political parties had been making preparations for an election to take place and by the July 1914, the following candidates had been selected;