I'm 37 with quite good skin (well, it's a bit red and dull sometimes, but good in terms of spots/wrinkles). I want to try and maintain that for as long as possible 
I'm looking for recommendations for a serum. I currently use Clinique, but at £50, it's quite expensive for a small tube. And I don't know if I've noticed that much difference. I want something that isn't extortionate, but don't mind paying for something that's good.
I also want to get into the habit of wearing a daily SPF. Looking for recommendations for that too 