Stumbled across a huuuuuuge collection of colour photos on Flickr, posted by the intriguingly-named "MajorCalloway". Amongst them are a small, but significant number of railway photos, including a gloomy platform shot inside Kingsbridge Station, circa 1961. Also this one at Dun Laoghaire.
They are mostly from the 1960s and 1970s, but there are some late '50s pics in there as well.
Click here to view the album
Kindly note that I accept no responsibility for wallowing in nostalgia