In reply to Andyb535:
In the past I've gone dressed ready for doing some outdoor activity as you usually do that as part of the interview. That was mentioned when the interview was offered.
But I would also always take a full suit, shirt and tie. When it came to the formal interview bit I would ask if they wanted me to change into something smarter. Some said yes, others no.
In my personal opinion they shouldn't want you to dress up smart though, as looking smart and presentable in office clothing has no bearing on how one instructs.
All the best with the interview
Post edited at 09:09