got 3 weeks of gullane next month, luckily sat cosy inside for my final fire safety module. Shall be having a pint or two at the golf view.
To answer the original question you will need to prove your alround abilities from being able to read, write, count and common sense physics type questions. Also prove your fitness with bleep test and other physical/practical tests which will also spot if you are a team player.
The modern fire service is also interested to see how you deal with people and the problems they can cause, and diversity issues like sexism or racial, homophobia for instance.
Best of luck, from my experience the first 20 years are the worst lol.
andy