Thank you so much Suzeeq! It seems so obvious now!
I hope it will work out well, I'm using the Rowan kidsilk haze yarn in white as I wanted it to be quite delicate. See how it goes, I was a bit hesitant to double the yarn up (I made some gloves and beret hat with the same yarn before where I had to double up and it came out beautifully).
Thanks again, it's brilliant!