Original sentence: Although not affiliated with the Commonwealth in an official manner, the prestigious Man Booker Prize is awarded annually to an author from a Commonwealth country or Ireland.However, the Ireland Act 1949 passed by the Parliament of Westminster gave citizens of Ireland a status similar to that of other citizens of the Commonwealth in UK law.Ireland left the Commonwealth upon becoming a republic in 1949.Ireland left the Commonwealth when it became a republic, on 18 April 1949, after passing the Republic of Ireland Act 1948; because it preceded India's London Declaration, remaining in the Commonwealth was not an option
Edited sentence: Although not affiliated with the Commonwealth in an official manner, the prestigious Man Booker Prize is awarded annually to an author from a Commonwealth country or the Republic of Ireland.However, the Ireland Act 1949 passed by the Parliament of Westminster gave citizens of the Republic of Ireland a status similar to that of other citizens of the Commonwealth in UK law.The Republic of Ireland left the Commonwealth upon becoming a republic in 1949.The Republic of Ireland left the Commonwealth when it became a republic, on 18 April 1949, after passing the Republic of Ireland Act 1948; because it preceded India's London Declaration, remaining in the Commonwealth was not an option