Now, this photo is completely serendipitous. Exploring the Aladdin’s cave that is Fabric World in Bletchley’s Queensway, I found my way upstairs where they have a curtain-making section.
I took a few photos of likely looking samples for future reference. Looking over this one at home I found this one contains 84% polyester; not normally something to get excited about!
As this photo was only going to be for personal use I didn’t take care to focus it, hence it’s slightly blurry. Sorry about that.