I'm writing a MG novel (MG is aimed at a core audience of Middle Grade readers aged 8 to 12) set in Northern England, but I don't live there, so I'm not familiar with the local sense of propriety. In the scene I'm working on, two kids from a small (500 inhabitants), rural village decide to go for a swim in a nearby lake. It is a common place for the locals to go swimming, so kids walking there to swim is a common view.
The kids are at the home of the 12-year-old girl, when they decide to go swimming. For practical reasons, the girl changes into her swimsuit, and then they walk to the boy's home where he changes into his swimming trunks. Then both kids walk through the village in their swimwear and over a path through the fields to the lake.
I'm a bit unsure about this. Where I live, when I was small, it was quite common for kids to run around in bathing suits when it was hot in summer, but this has changed and I don't see kids in swimsuits in town any longer, except for toddlers playing in the fountain on the market place. Older kids aren't as carefree today as we were, and they dress properly on their way to the public pool.
But how is that in England (today)? Would an English reader reading my book think that that's not how English kids would behave? Or would they find it completely normal?