"Gosh" Makeup at Superdrug is on 3 for 2 at the moment and is the most beautiful range in the entire world.
They do extremely waterproof eyeliner in all colours of the rainbow. I went swimming with turquoise eyes and still had turquoise eyes after my post-swim shower. It's that tough you need to remove it with baby-oil.
It's amazing and beautiful. Get some.
Boys. If you didn't enjoy this post, what can I say, you were warned.