[1] The title takes its name after Willesden, an area of the London Borough of Brent; the See was erected under the Suffragans Nomination Act 1888 by Order in Council dated 8 August 1911.
[2] The post was created in 1911, and was the third suffragan bishopric erected in the diocese since 1879.
[3][4] By November 1911, the Bishop's residence was 13 Cannon Place, Hampstead.
[5] In the experimental area scheme of 1970, the bishop was given oversight of the deaneries of Brent, Harrow, Ealing East and West, and Hillingdon.
[7] The bishop now has responsibility for the Willesden Episcopal Area, that is, the Archdeaconry of Northolt, comprising four deaneries: Brent, Ealing, Harrow and Hillingdon.