Reddit mentions of Laval Powder Blusher - Peach Haze

It looks like you want something shimmer-free and cool-toned, and maybe drugstore brand so you can experiment a bit before settling into a new forever-brand. Trying to make sure these are available in uk!

Maybe:

Maybelline Fit Me! Blush Light Peach

Maybelline Face Studio Master in Coral Fever/Peach Pop/Rosewood

Loreal blush peach paradise enchanted Just Curious <--nevermind looks like not in uk

[Laval Powder Blusher - Peach Haze] (https://www.amazon.co.uk/Laval-Powder-Blusher-Peach-Haze/dp/B003BVZHVC) People are snobby about Laval bc cheap but they're great for experimenting. This one might be too dark for your purpose but cheap enough to play around with. The girl who posted a pic in the reviews shows it applied quite light and really pretty!

Applied

Clarins Blush Prodige Illuminating Blush in Rose wood/soft peach (palette-y)