Simplify the following text for a Grade 9 native English-speaking person.
Original: Walter Edward Guinness , 1st Baron Moyne DSO & Bar PC ( 29 March 1880 -- 6 November 1944 ) was a Anglo-Irish politician and businessman .
Simplified: Walter Edward Guinness , 1st Baron Moyne DSO & Bar PC ( 29 March 1880 â `` 6 November 1944 ) was a British politician .