A late reply to Barrie Roberts (2005) :

Re: John Foreman's version of the 'Cockney Alphabet', I think you'll find his W is 'for a quid' and his Z is 'for 'is 'at' (i,e. 'His head is for his hat')

Yes to W for a quid, but in the version I recorded, he uses the Zephyr Breezes line for Z.

If anyone wants to hear it, I can direct them to a private URL.