a hard one - black long sleeve blouse suitable for hot weather?

[nongnangning]

OK this one is a bit of a challenge. Your style ideas solicited.
I would like to buy a long sleeve black blouse for a formal, work-type event ... but for wearing during hot weather, like recent UK heatwaves when its baking. The blouse has to have long sleeves - this is non-negotiable.
I've got this one below from Cos, which I think the shape of suits me well, but it's quite heavy fabric and I think I would be too hot in a heatwave.
https://www.cos.com/en-gb/women/womenswear/tops/blouses/product/voluminous-pleated-blouse-black-1318588001
Has anyone seen anything that might work? I'm a 14-16 on top - so something flattering to bigger boobs and not skintight would be great. Price point - would try anything, and up to about £150ish for the right thing. TIA

I have a black long sleeve broderie anglaise shirt from M & S which is incredibly cool to wear on a hot day. However, I bought this a couple of years ago. There is one on the Finery site which isn't quite as holey, but it does allow for ventilation.