I believe "controlled" means "has traffic lights" (controlled by pedestrian signals, or on a cycle).

"Uncontrolled" crossings I think include Zebra crossings.

I thought so, but then read "Zebra crossings are a type of controlled crossing" on Wikipedia. This may be a mistake (possibly in the source).

Edit: found a definition in a document by the Chartered Institution of Highways and Transportation. "Uncontrolled crossings do not afford pedestrians any particular priority over motorised traffic", and so it classes zebra crossings as controlled.