Further to the completion of the 2023 Periodic Review of Westminster constituencies, the seat was expanded to include the town of Musselburgh.[4] 1955–1974: The burgh of Musselburgh and the Craigentinny, Portobello and Craigmillar (with the exception of the area added by the Edinburgh Corporation Order Confirmation Act 1954).[7] 2005–2024: The City of Edinburgh wards of Tollcross, Southside, Holyrood, Meadowbank, Mountcastle, Leith Links, Restalrig, Portobello, Milton, Prestonfield, Craigmillar, and Duddingston.It included the areas of Craigmillar, Duddingston, Holyrood, Leith Links, Meadowbank, Milton, Mountcastle, Portobello, Prestonfield, Restalrig, Southside and Tollcross.The political parties had been making preparations for an election to take place from 1939 and by the end of this year, the following candidates had been selected;