 Yet by 1906, industrial dissension and political militancy had begun to undermine Liberal consensus in the southern coalfields.In 1916, David Lloyd George became the first Welshman to become Prime Minister of Britain when he was made head of the 1916 coalition government.In December 1918, Lloyd George was re-elected at the head of a Conservative-dominated coalition government, and his poor handling of the 1919 coal miners' strike was a key factor in destroying support for the Liberal party in south Wales.