Stott’s is the original. But if you were around at the time here in the US and pulled this song out a stack of 45s, you most likely would find neither version.
http://en.wikipedia.org/wiki/Chirpy_Chirpy_Cheep_Cheep
This first cover is the one that did the best here in the US at #20 on Billboard;
https://www.youtube.com/watch?v=TvVjrdAmBpE