The external jobs site, at least in terms of signaller jobs, seems to be feast or famine regarding certain areas, at the moment. Lots of recent/current vacancies for Haslemere and Hereford area for example.
So bearing that in mind, if i was waiting for a job to come up in a certain area, I'd be using the resources available (this thread, plus elsewhere) to make sure my CV, 69 questions etc were the very best they could be BEFORE anything was advertised, so there was less chance of disappointment if the eventual desired position is closed early due to volume of applications.
Just thinking out loud...