Scotland particularly in relation to taxation, were devolved to the Scottish Parliament after the referendum, following cross-party talks in the Smith Commission. The mainland of Scotland comprises the northern third of the land mass of the island of Great Britain, which lies off the north-west coast of Continental Europe. The total area is , comparable to the size of the Czech Republic. Scotland's only land border is with England, and runs for between the basin of the River Tweed on the east coast and the Solway Firth in the west. The Atlantic Ocean borders the west coast and the North Sea
England–Wales border 1972. Whether Monmouthshire was part of Wales, or an English county treated for most purposes as though it were Welsh, was also settled by the 1972 Act, which included it in Wales. The modern boundary between Wales and England runs from the salt marshes of the Dee estuary adjoining the Wirral Peninsula, across reclaimed land to the River Dee at Saltney just west of Chester. It then loops south to include within England an area southwest of Chester, before rejoining the Dee, and then loops east of the river to include within Wales a large area known as Maelor, formerly