Sorry, no, it is not the A-Tune plug-in.

It was a Digitech Talker and a Nord along with other goodies.
See the following article direct from the guys who recorded it: http://www.sospubs.co.uk/sos/feb99/articles/tracks661.htm

You can get similar results by setting a pitch-correct plug-in/module to perform full semitone correction steps, but it is not exactly the same sound.

David
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