Thanks to the collective memories of previous posters, more information came to light:
"Cielito Lindo is a popular traditional song of Mexico, written in 1882 by Quirino Mendoza y Cortes (c. 1859-1957) and arranged for the mandolin by John Hayes of East Sussex, UK. If the tune sounds vaguely familiar to you it was turned into a song and recorded by Alma Cogan" Tom Cunliffe on Mandolin ...which led me to an eBay listing for a 78:

http://www.ebay.com/itm/CLASSIC-1956-ALMA-COGAN-78-YOU-ME-AND-US-THREE-BOTHERS-UK-HMV-POP-284-EX-/120848269348 "UK HMV POP 284 10" 78rpm SHELLAC - The Music for "You, Me, and Us" is based on the Mexican traditional folk song, "Cielito Lindo." The song is credited to John Jerome for both words and music, but undoubtedly only the lyrics were actually his creation."

and this sound recording: http://www.youtube.com/watch?v=FYWDscvU0J0

You Me And Us ( 1957 ) Lyrics John Jerome Music 1882 by Quirino Mendoza y Cortes (c. 1859-1957) as sung by Alma Cogan

YOU ME AND US
(Lyrics John Jerome, Music 1882 by Quirino Mendoza y Cortes)

You, me and us
We are my favourite people
We all go together like peaches and cream
Or bells with a church and a steeple

Some people I know, I'm fond of and so
All day I keep singing about them
For one of them's you and, Darling, it's true
I find that I can't live without them

You, me and us
We are my favourite people
We all go together like peaches and cream
Or bells with a church and a steeple

The stars were as bright as diamonds the night
We met and we danced and we flirted
With one look at you, my dream had come true
And nothing will ever divert it

You, me and us
We are my favourite people
We all go together like peaches and cream
Or bells with a church and a steeple

Now, outside of town we all settled down
Our place isn't big, but it's cosy
I know that you're mine and ev'rything's fine
Our future forever is rosy

You, me and us
We are my favourite people
We all go together like peaches and cream
Or bells with a church and a steeple

Yes, we all go together like peaches and cream
You, me and us!