Barnardo's has a dress code much like any other retail based job. For a volunteer position it doesn't make much difference. Only thing to be aware of is no open sandals and no jeans on the shop floor. If it's an interview for a paid position I would definitely recommend smart clothing. Black trousers and a blouse or something similar to that that.
I went in jeans and t-shirt as it was July still got the position. Don't think the managers mind in the stores as they wear normal clothes
I would say a suit for professionalism.
It doesn't really make a difference
Well dressed, claen, tidy and as smart as possible.
I wore causal clothing
Smart casual, black trousers, blouse, jacket
You should dress casually smart for the interview and also on your start date.
Jest clean and tidy smart appearance with the intention of giving the interviewer a show that your are very keen to work there