Coordinates: 58°16′37″N 3°46′44″W / 58.277°N 3.779°W / 58.277; -3.779 Caithness, Sutherland and Easter Ross is a constituency of the House of Commons of the Parliament of the United Kingdom (Westminster). It is the most northerly constituency on the British mainland. It elects one Member of Parliament (MP) by the first-past-the-post system of election. The constituency is estimated to have voted to leave the EU by a margin of 52% to 48% in the 2016 Brexit referendum. Since the 2017 general election, the constituency has been represented by Jamie Stone of the Liberal Democrats.