According to www.railwaycodes.org.uk/ELRs/_mileages/G/GAW2.txt there were 2 junctions just north of the old Brymenyn station being "Bryngavn" (aslo known as Bryngavn Junction") 0.55 miles north of the junction to Ynysawdre and Boyles siding 1.40 miles north of the same junction.
Despite some detailed research I have been unable to determine anything further about these.
Semlyn, Sadly we do not appear to have a map for the junctions North of Brynmenin. Nevertheless, on one of the original, hand coloured maps of the area. It shows that there were two sets of points just to the North of Brynmenin level crossing. These both served the Bettws/Llangeinor mine which was hidden in the opposite the Old Peoples Flats up on the main road. The first junction doubled the single track that came over from Brynmenin Level Crossing. From it led several sidings to the Washery and the head of the mine. The second junction to the north is a little way beyond the junction of Abergarw Rd and the main road. The double line was then singled all the way up to Llangeinor. On the original map the name Bryngavn does not appear? Is it possible that this is a misprint on your document for Bryngarw? I hope that this information helps in some way, and ask that if you have any information, maps, photographs or other artefacts pertaining to the railway, or indeed and part of the Garw Valley you would share them with us. G Jarvis
Thanks for the various replies. I have been away on holiday & am trying to catch up on various emails/posts. I am a new member of the Garw Valley Railway Society but no-one there can shed any light on my queries. Boyle's siding seems to relate to William Boyle of Birmingham who was at one time a shareholder of Bettws Llangeinor Colliery. I have been able to determine some detail of his life & downfall from newspaper reports & census records. Bryngavn may well refer to Bryngarw but I will need to revisit my source to confirm this.