I don't have my license in front of me, so I can't give you the exact text, or the section numbers.
The "vanilla" JAR PPL does not mention night flying at all.
When you get your night qualification, the CAA send you a replacement for one particular page. The page looks absolutely identical, and it's only when you compare it word-for-word with the old one that you realise they've added the sentence "the holder of the license may exercise the privileges of the license at night" at the end of one of the sections of the license - pretty much as spils describes.
It will probably be a while before I have my license in front of me at the same time as being in front of a computer, but if no one else has found the information before then, I'll try to remember to post the details of exactly which section contains that text.
FFF
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