I have combination skin, and mild acne, so applying make up is quite a challenge for me. I've found a foundation from Clinique that works well on my skin and doesn't irritate it (my skin is insanely sensitive), however some days I feel that my skin isn't providing a very good base for my foundation. After much deliberation, I've decided that investing in a primer would help solve this problem, so I am looking for a decent brand, which I hope someone can recommend. I live in the UK, don't really want to be shipping in from other countries, and am prepared to spend around £15 - £20. If you can recommend something, that would be great! Thank you!