Complex sentence: The 1931 enactment in London of the Statute of Westminster from a British perspective officially gave the Irish Free State's full legislative independence, however this event was not marked in Dublin as the Irish considered that full legislative independence had been achieved in 1922.
Split into simpler sentences: The 1931 enactment in London of the Statute of Westminster gave the Irish Free State's full legislative independence. However, the Irish considered that full legislative independence had been achieved in 1922.