An artist’s impression of the 660m Narrow Water bridge, which would span the neck of Carlingford Lough and would link Down and Louth just outside Warrenpoint to the north and Omeath to the south. The bridge could also open to allow boats to access the Newry Canal and the Albert Basin in the city. Photograph: Department of the Environment, Northern Ireland.

Planners have given the go-ahead for a controversial €18 million cross-Border infrastructure project backed in the main by EU funding. However,(...)