I have a Flanders and Swan Song Book published in 1974 by CHAPPELL & CO , 50 New Bond Street, London W1 .... it has these songs>>>>
The Elephant
The Gas Man Cometh
A G-nu
Have Some Madiera, M'dear
The Hippopotamus
The Rhinoceros
A Song of The Weather
A Transport of Delight (The Omnibus)
The Wharthog
The Whale(Mopy Dick)
Your local library or bookshop should be able to tell you if it is still in print