With Red Zone working banned on the majority of the network even if there are no trains work can’t take place without a line block. No signaller, no line block, from what I’m hearing those who have been signed off as competent work signalling locations aren’t permitted to grant line blocks….
There will also be an issue with planned patrol works not being able to be taken again due to PWay staff, and signallers being on strike, a risk that patrols wont be carried out and sections of line having to be closed as safety inspections having not been undertaken within the specified times.
Without trains running there's a good opportunity to do surveys, inspections etc. which do not require engineering trains. But the bigger difficulty will be gaining possession access without a signaller
Almost all work now requires a line blockpage, even just for access. No signaller, no line block, no work.