I know this song. Somewhere my parents have it (a bit gargled) on open reel tape. I love it but have never been able to track down a copy.

Another verse goes:

Goodnight to all the postmen who call at our address,
And deliver all those letters that are marked OHMS

I am 99% sure that the policeman verse went:

Goodnight to all the policemen, as on the beat they creep,
We hope you find a cosy spot in which to have a sleep

One day I hope to get hold of a good recording of this - or at least my parents reception-affected one. I have the worlds copied out somewhere if only I could find them :(