Urban myth, I'm afraidhttp://www.lvta.co.uk/history.htm
"There are a number of myths and legends that surround the London cab and its cabmen and many of them are nothing but bunkum. For instance, it has never been law for a motor cabman to carry a bale of hay in his cab. In fact, it was never law for a horse cabman to carry one, although he was required to carry sufficient hard food (e. g. oats) for his horse’s midday feed."
Yes, the difference is largely between those who first heard the name and those who first read the name. Deptford is pretty much the same. Locals use a glottal stop for the /pt/ bit, others choose to either pronounce the /p/ or the /t/.Greenwich is a difficult one to pronounce.
Most people say "Gren-ich"
Locals call pronounce it "Grin-idge"
CarlP is a very wise sage
I like WD40WD40 is a lubricant.
My sister insists on pronouncing Todmorden as Tod-MORE-den rather than Tod-muh-dun and Mytholmroyd as Myth-um-royd rather than My-thm-royd.I've lived in Halifax, Hebden Bridge, and Todmorden, but have only ever heard one local pronunciation of Mytholmroyd (which is where my kids went to school).
Sowerby Bridge has at least three local pronunciations, however.