Like you, I knew there were some differences between the individual fire services but I didn't realise some were still using the older system, I thought everything was changed over at the beginning of the year, my fault for assuming.
The joint fire board sounds similar to the Welsh fire services as well, they seem to combine some of their recruitment too. I also agree with you, taking one step at a time, I think you need to pace yourself with these applications. Thanks for the info on the feedback, I probably won't be able to get any then cause the fire services I've applied to say not to ask for individual feedback.
Hopefully someone with a bit more experience might be able to give you more help. Good luck with your applications anyway.