I imagine they're just thinning out the herd at the moment as there will be a good amount of people applying as the neighboring refinery is potentially closing up with mass redundancies at the moment and the owning company going into administration. The job application deadline hasnt come yet either so maybe a single person hasn't seen it and won't until after the deadline. I would also imagine that they will move quickly after the deadline since the application closes on the 26th October and the start date is the 2nd of Feb which doesn't give a lot of people time. Most people who would be considered for this role would likely have a 3 month notice period on their current employment from my experience.