I come back to the Dartmouth Arms example. And there really is no reason why a decent deli couldn't thrive in FH.
Perhaps, perhaps not. I'd favour the not, personally, but you never know. But not there, surely?
There's plenty of passing trade on foot as well as scope for car owners to stop outside for the 5 or 10 minutes they'd need to buy a few delicacies. The free and immediately accessible parking angle represents an advantage over all of London Road and half of Dartmouth Road. I imagine shop rents would be substantially cheaper here too, so attractive for the small businessperson viz. the Polish Deli on Sunderland Road.
It does take a leap of imagination though. But trhat isn't without precedent. I think most people's perceptions of Dartmouth Road have changed substantiaaly since the Dartmouth Arms was gastro-ed.