Agreed, Malcolm, particularly since some of the new additions don't make sense:

In autumn when the oak trees turn
We (...) go rambling in the new mown hay

Huh?

I've not heard any of those verses (apart from 1 & 4) despite hearing the song sung many times at various festivals around the country.

P.S. Liz, yer letting the (blonde) side down, girl- learn yer clickies!