OC8 is one of the products Jolie NYC (also known as outed blogger Nadine Haobsh) raves about, and when she raves about something, I've discovered she's normally right. If that's not enough for you, five out of seven reviewers at Ciao gave it the full five stars.
It's an oil controlling lotion that has been clinically proven to keep oil slicks at bay for eight hours a day. Before I struggled to find an 0C8 stockist in the UK, but like buses, while before there was none, now they are heading at me left, right and center. As well as Boots, Superdrug and Sally stores, it's also available online at Pharmacy2u and Boots. It'll cost you £9.99 at Boots, but I suggest trying a sample to see if it suits your skin first - the OC Eight site is currently out of samples, but check back for more or ask for a sample in larger Boots stores.