Thanks, Q, in case you or anyone else is still reading this, the Working Man's Alphabet was what I sought, having found a reference to the People's Alphabet in a novel -

F stands for freedom, which old England brags about.
If you haven't got a dinner, why you're free to go without.

Also great to see complete versions of the Cockney Alphabet, for the ones I and my family have forgotten. Variations we use -

C for th'islanders - Seaforth Highlanders
D for a station - deforestation
I for Novello/the Engine - Ivor Novello/the Engine
N for cement - enforcement
O for the rainbow - over the rainbow
Y for sister - wife or sister