Line status (Block) indicator (Normal=no train, Line Clear=train accepted, 
Train on line=train in section between Pontrilas [neighbouring box to the 
North] & Abergavenny Signal Boxes) 12 June 1990.  This box was built by GWR 
& is still in use by Railtrack. Photo & scan copyright Pat & David Othen, 
Dartmouth NS Canada (dothen@ra.isisnet.com)