Hello thrashingbeast and welcome to the Forum. We don't have many members from Northern Ireland, so far as I'm aware, so hope you enjoy the site. There is a huge amount of knowledge available here but clearly this question is a difficult one! I can't find a photo but I don't know if the following link might help you at all:
http://www.s-r-s.org.uk/html/sra/R1517.htm