Gwilym,
Where did you get the second verse of your compilation version? Was it from the recording you mentioned? I have the same verse from This England magazine Winter 1979. It comes also from Gloucestershire.

Goodbye Freddy Archer, your racing days are o'er
And you have reached the post, my lad, where men return no more
And by your own hand, Freddy, you caused the world to say
That you died broken-hearted, the champion of the day.

Sent by F Price, Quorn, Leics. He enlisted at Stroud in 1914 and learnt this from an older soldier.