Complex sentence: Griffith-Boscawen had a special interest in working class housing throughout his career and was a Tariff Reformer who admired Joseph Chamberlain because he became a very influential Conservative even though he was not from an aristocratic background.
Split into simpler sentences: Griffith-Boscawen had a special interest in working class housing throughout his career. He was a Tariff Reformer who admired Joseph Chamberlain because he became a very influential Conservative even though he was not from an aristocratic background.