I've got a question about signalboxes that aren't block posts. I sign to Holyhead and anyone who knows the route will know there's a big block section between Valley and Gaerwen. Ty Croes is handily situated inbetween these two but isn't a block post. My question is why not? It looks like a box, has a crossing and semaphores and has someone in there 24hrs at an educated guess. There obviously has to be a good reason why this occurs, could someone better explain why I've sat at either end on many occasions waiting for the section to clear when it could be shrunk.