The 1911 Arfon by-election was a parliamentary by-election held on 11 February 1911 for the Arfon division in Caernarvonshire in North Wales, a constituency of the British House of Commons. It was the first by-election to be held after the December 1910 general election. The by-election was held because the sitting Liberal Member of Parliament (MP) William Jones had been appointed as a Junior Lord of the Treasury in H. H. Asquith's Liberal government, and until the 1920s MPs appointed to positions in government had to seek re-election. Jones had held the seat since the 1895 general election, and at the by-election he was re-elected unopposed. Jones died in 1915, triggering another by-election References Sources 1911 in Wales 1910s elections in Wales 1911 elections in the United Kingdom Politics of Caernarfonshire History of Caernarfonshire Unopposed ministerial by-elections to the Parliament of the United Kingdom in Welsh constituencies February 1911 events