OK. I can understand how a dish of potatoes sliced and baked in cream etc can end up with a name derived from the French, but a deep fried disk of battered potato? Did some gang of French navvies present themselves at a Smethwick chippy one lunchtime, recognise a familiar fried object, then order in in their native tongue? Was the chip shop proprietor so taken with the new appelation that it stuck, and spread to other shops nearby?