 A refuge siding was built for freight trains at Llanerchymedd in 1878, along with an engine shed in Amlwch.In 1882, new station buildings replaced the basic wooden sheds at Holland Arms, Llangwyllog and Rhosgoch, as well as development of the junction at Gaerwen into a full double junction, and a second signal cabin built there.An extended Amlwch station received a canopy by 1884.