I ended up in hospital last year with acute appendicitis. I spent 9 days in hospital, and it was 2 months before I was back at work full time. When I signed back on to the computer system, the stuff I had being doing had been left even though it was required urgently. Its not safety related - it was financial reporting software, so not a biggy. But the manager had no spare staff to pick up my stuff, get to understand it and move it forward. But at a small railway signing on point, or a remote signalbox, what happens when someone rostered calls in sick. Somewhere small. (I am thinking of somewhere like Skipton where 20 drivers and 20 conductors will be signing on early. or remote locations like Garsdale or Kirby Stephen signalboxes) Do they ring round trying to get people to work an extra shift? or have spare staff? or just cancel trains. And what effect does it have when someone is going to have to be off for a month? They could throw the rosters into a complete mess. (And I know rostering is difficult because of different traction and route knowledge) lastly, what happens when a bug goes through a signing on point? Losing some of your staff due to a tummy bug must also play havoc with rostering.