Thompson, who is not listed in Michael Stenton’s Who’s who of British Members of Parliament, 1832-1885 (1976), was a ‘well known figure throughout the county of Cumberland’, who sat briefly as Conservative MP for Cockermouth.
In April 1868 Thompson offered for a vacancy at Cockermouth following the death of the sitting member. Accused by his Liberal opponent of being merely a ‘nominee’ of the Lonsdale interest based at Cockermouth Castle, Thompson endured a difficult canvass, but following a hard fought campaign he was returned by a majority of twenty-six votes.
Thompson is not known to have spoken in the Commons, but his votes against Gladstone’s Irish church proposals, 30 Apr. 1868, and the representation of the people (Scotland) bill, 25 June 1868, reflected his Conservative loyalties. He retired at the 1868 general election, believing that he had no chance of success after Cockermouth’s representation was reduced from two seats to one.
