Having been put in mind of the old adverts I decided to try again for the Whitbread ones (Percy French parodies). Now the one I couldn't find in the past, and another, are on the net.

From Here

Now legend lampoons one old humpy galoon,
Who loved Whitbread Best Bitter beer.
But he got an eyeful of his canny rival
One Abdul the Bulbul Ameer.

Now that man with his can really shook poor Ivan
Thinking drinking from tins irregular.
If it's take home he needs let him take home this steed
Reasoned Ivan Skavinsky Skavar

Oh Abdul had this ploy of a female decoy
Fooling Ivan who fools he rejects.
Be it draught or in cans well we don't give a ***
But the best best needs no etiquette.

From Here

From the old hist'ry books come two battling bazooks.
Count Ivan and Abdul Ameer
But on the dot of half five, they knock off feeling dry,
And request Whitbread Best Bitter beer.

Now Abdul likes his jug in the men only snug,
Telling blue jokes not for ladies' ears.
While Ivan's lip curls, "Whitbread's best with the girls."
And I think the advantage is clear.

So we now see Abdul break his 'men only' rule
"But at Whitbread they say 'What the heck'
Drink with ladies or gents" it makes no difference
'Cos the best best needs no etiquette.