Robson was Liberal candidate at the Berwick-upon-Tweed by-election">Berwick-upon-Tweed (UK Parliament constituency)">Berwick-upon-Tweed by-election. This was a Liberal seat which had been won by a supporter of the Coalition Government in 1922. In the by-election, a Unionist won the seat. He was Liberal candidate again for the Berwick-upon-Tweed division at the 1923 General Election, when he came within 2,000 votes of defeating the Unionist. He fought the seat a third time in 1924 without success. He was Liberal candidate for the South Shields division at the 1929 General Election. This was a Liberal seat won previously due to the absence of a Unionist candidate. This time a Unionist intervened and he lost the seat to the Labour Party by just 40 votes. He did not stand for parliament again. He was Vice-Chairman of Northumberland [County Council] from 1935 to 1937.
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Robson was a Member of the Committee of Management of the Royal National Life-Boat Institution from 1936 and Vice-President from 1955.