The constituency of Angus lies on Scotland's east coast, stretching from Montrose in the north to the Firth of Tay in the south, where it virtually surrounds the city of Dundee.
Agriculture is unsurprisingly one of the major industries, as is tourism thanks to the seaside resorts and attractions like the championship golf at Carnoustie. But engineering, fishing, food processing, textiles and pharmaceutical industries are also found in the seat.
In 1966 Mrs Thatcher’s friend and confidant Jock Bruce-Gardyne held the seat of Angus South (as it was then called) with the biggest Conservative majority in Scotland. It was an upset when he was defeated by the SNP’s Andrew Welsh in October 1974.
Mr Welsh held the seat until 1979 when Peter Fraser, now Lord Fraser of Carmyllie, regained it for the Conservatives. In 1987 the tables turned again, Andrew Welsh won it back and has held it ever since.
Mr Welsh is standing down from Westminster, to focus on his role as an MSP.