Can anyone recommend a good day moisturiser with a high SPF? I tend to switch between Boots Protect & Perfect (SPF 15) & Oil of Olay (the 7 signs of ageing one, SPF 15) but am considering splurging on the Clarins double serum. I had a 7 day trial of it and was amazed at how fab my skin looked/felt but I need to cut a cost elsewhere to justify buying it so thought I could maybe make do with a cheaper moisturiser - preferably one with a higher SPF? Thanks.