Promoted to brigadier-general in 1704, Boyle took part in a successful raid on Barcelona in 1705; he was again sent home to present the despatches. Queen Anne rewarded him with another gratuity. Promoted to major-general in 1708, he became Joint Controller for Clothing the Army that year. He also entered the House of Commons in 1708 as Member of Parliament (MP) for Arundel. His brief membership of the Kit-Cat Club, which met at the Trumpet tavern in London, gave him useful access to ministers and other key influencers including the Earl of Scarborough who had nominated him as a candidate for his seat in Parliament. At this time he was said to have had "an openness and frankness in his conversation which are highly engaging". In Parliament he supported the Whigs and voted for the Foreign Protestants Naturalization Act 1708 which allowed Protestants fleeing from the continent to enter Great Britain.