I did have a map showing the microwave links used by RTE in Ireland a few years ago, but I don't think I still have it.
As I recall, RTE also had a microwave link from somewhere in the northeast (Co. Louth, Co. Monaghan?) to their studio in Belfast. I assume that the RTE Belfast studio also had links to the BBC and Ulster ITV network as well.
I've lost track of who exactly controls what in Britain these days, but up until the early 1980s most TV distribution was by way of mixed microwave and coaxial systems leased to the BBC/ITV by the GPO.
