I've tried to listen with as close an ear as possible, and this is what I get from Carole Pegg on Mr Fox's LP recording:

Cold blows the wind on Silbury
Cold blows the wind on Frome
But colder still the wind does (does't?) blow
All around the ragged stones

I worked the land with all my kin
And many's the change I've known
That (but?) strangers now have come to blight
The seeds that we have sown

The harmless hare that runs the ridge
The gulls that chase the plough
The lofty pheasant all are seen
And each is wary now

And daily sounds the cannon-fire
Its echoes shake (echo shakes?) the plain
The fox and rabbit both are forced
To flee from their domain

The girls once flocked to see the blues
As they passed gaily by
But you're welcome as the cold, cold rain
That darks (dogs?) the summer sky

And friends ask me, when will there be
A bull without a horn
And I say when there grows a rose
Without a prickly thorn

Cold blows the wind on Silbury
Cold blows the wind on Frome
But colder still the wind does (does't?) blow
All around the ragged stones