I live abroad and I knew it was outside the season but I was looking for a thin shirt.
The inside was bright and the staff was plain-spoken, good impression.
That's GU indeed, there were many items and the price was reasonable, it was difficult to decide what to buy. In the end, I bought a standard Oxford White shirt. I was very happy with the quality and its comfort. It was a shop I want to pop in when I'm looking for something.