I don't know what it is, but I'm just not a fan of Yardley's foundations.
This one in particular is probably my least favourite.
While I like a full-coverage foundation (which this one is), it just feels heavy and as if my face is being suffocated.
It definitely did cover all my imperfections, but after a few hours of wear, my skin looked oily and gross, and the foundation had oxidized, so it no longer matched my skin tone. What a disaster!
I think this might be a good option for someone with very dry skin, but it unfortunately didn't work for me at all.