In reply to:

While shepherds washed their socks by night
All seated round the tub,
A bar of Sunlight Soap came down
And they began to scrub.

Yes, I vaguely remember Sunlight Soap, but haven't seen it for a long time. The unofficial version of the carol, we had was:

While shepherds washed their socks by night
all seated round the tub
an angel of the Lord came down
and soapsuds flew around.

Bingley


Bingley