I've been told to wear "business casual" to my URNU meet and greet tomorrow night, but I'm unsure if wearing my suit jacket goes a step to far into business. I'm already wearing the suit bottom but I'd like to save the jacket for if I actually get an interview.
As I work in an office where business casual is the rig of the day unless meeting clients:
chinos/smart trousers/suit trousers if you must (!), decent shoes, jumper as required. No need for a jacket. Otherwise known in the RN as planters. Def suit for the interview as you suggest. Good luck.
Business casual to me says trousers (without the crease), a shirt, no need for tie, possibly a thin plain black/grey jumper over the shirt, shoes of course. No need for a tie (can do though if you like), and no need for a Jacket.
Worked in HR at WHS Head Office for years, the above is pretty much what they'd describe as Smart Casual!