i dont know what youre going for but youd look more of a tw*t being underdressed than overdressed i think.
i wore shirt and tie to my first "informal" interview. was pretty relieved when i saw someone in the waiting area dressed the same
Every single interview I had I turned up in a suit. Do you want them to think your dedicated or can't be arrsed? Can never go wrong with smart, except for your 1.5 mile run, I found my tie kept whipping me in the face!
When I went to get some info about the infantry, when I first started the application process, I went tuckered up to the eye balls, even learnt how to do some fancy tie-knot for the occasion, a little OTT lol but it's better then looking like a scruffy t**t in kappa gear.
Each and every time I've been down to my local office, I never seen anyone with a shirt and tie, that said, it is Bradford; maybe I'm expecting too much.
There is no such thing as an 'informal interview'. Not in the military, not in civvy street. An interview is an interview and impressions are always made.
The rules are simple:
1. Always be smart.
2. Always polish your shoes.
3. Do your homework on the subject before you go in.
4. Always have a handy few questions to ask (even if you know the answer) to demonstrate that you are interested but don't know everything, therefore keen to learn.
Following these simple rules I have seen much more success than failure.