The aim of the bill is to grant Scottish ministers the necessary powers to construct a new road bridge over the Firth of Forth, adjacent to the existing Forth Road Bridge, along with new and upgraded connecting roads.

BBC: Forth Crossing Bill debate

The five options are Caledonia Bridge, Firth of Forth Crossing, St Margaret's Crossing, Queensferry Crossing and Saltire Crossing.

BBC: New Forth bridge plans move ahead at Scottish parliament

The distinctive red cantilever bridge spans the Firth of Forth between the villages of South Queensferry and North Queensferry, and carries the railway line between Edinburgh and the north.

UNESCO: UK goes Forth at World Heritage Conference in Bonn