Aglionby’s maternal ancestors had first settled in Cumberland at the time of the conquest, where they had a grant of lands in Warwick parish, which they subsequently named Aglionby.
Following two unsuccessful attempts to be returned for Cumberland West at the 1833 by-election and the 1835 general election, Aglionby offered as a Liberal for Cumberland East in 1837. The contest, in which the ‘Netherby turncoat’ Sir James Graham sought re-election in the Conservative interest, was a dramatic affair which captured national attention.
A frequent attender who is not known to have spoken in the Commons, Aglionby supported Melbourne’s ministry on most major issues. His votes for the ballot, 15 Feb. 1838, equalisation of the borough and county franchises, 4 June 1839, and the abolition of capital punishment, 5 Mar. 1840, reflected his radical instincts, though he voted against motions to reconsider the corn laws, 15 Mar. 1838, 18 Mar. 1839. In February 1838 he was appointed to the Sligo election committee.
In July 1840, when crossing the lobby of the Carlisle court house to attend the midsummer sessions, Aglionby stumbled at the foot of the stairs and died almost immediately from a fit of apoplexy. The inquest recorded a verdict of ‘natural death’.
