In 1934, Scott was selected as Liberal candidate for Perth. A by-election arose there in 1935 when Lord Scone, the sitting Tory MP,  succeeded his father as Earl of Mansfield and Mansfield and went to the House of Lords.
In 1934, Scott was selected to represent the Liberal Party in Perth.  A by-election took place in Perth in 1935 after Lord Scone, the previous Tory MP, became an Earl and moved to the House of Lords.