Military traffic to West Wales of course.
Baglan Bay refinery finally closed in 2004, I'm unsure what (if any) residual petrochemical traffic exists. Light industry has moved in such as the Baglan Bay CCGT power plant and a proposed biomass power station.
Further west, there was talk of a container facility being established at the former RNAD at Trecwn with some Class 73s being moved there. I haven't heard any more on that for a while.