> If you google "Paddington prison" you'll see a similar striped outfit.

Horizontal Stripes were common in US-Prisons until the early 20th Century [1]. While vertical Stripes were common in Nazi-Camps. It's a very distinct difference, and I would think the source-material has more data about the horizontal than the vertical stripes. So it's fair to ask which specific prompt they had to get pictures from Nazi-labour-camps.

[1] https://en.wikipedia.org/wiki/Auburn_system

Horizontal stripes are still a thing in some states. Prisoners on a work gang in Georgia were wearing them in 2017, as seen in this story.

https://www.bbc.com/news/world-us-canada-40350048