34 minutes ago, Susanwusan said:
Bangers and mash with gravy - yum! Perhaps taxi driver's background wasn't English? Anyway, we even had a cartoon called Bangers and Mash, back in the 80s.
A little off topic, but @mgaretz did specify a 'black taxi'. To be licenced as a 'black cab' driver, you have to pass a highly demanding examination - the toughest licencing system in the world for taxis. It normally takes three years to study for it - equivalent to a university degree course.
Basically, candidates have to memorise 32 routes within London and know all the "streets, squares, clubs, hospitals, hotels, theatres, embassies, government and public buildings, railway stations, police stations, courts, diplomatic buildings, important places of worship, cemeteries, crematoria, parks and open spaces, sports and leisure centres, places of learning, restaurants and historic buildings" within a 1/2 mile of each of those routes.
I'd say the chances of any licenced black taxi driver not knowing what 'bangers and mash' are is electron-microscope-requiringly miniscule, irrespective of their original nationality.
(Bolding of 'restaurants' by me, in a desperate attempt to include something culinary! List from Wikipedia here.)