Big crispy portions flopping on big oval plates eaten with a big knife and fork to big 1950s sock-hop music: The franchise-ready Poppies does for British fish and chips what peppy jukebox diners have done for mid-20th-century American food. Amusingly, it wraps its chips in custom-printed newspaper since it’s now illegal to use the chemical-laden real thing. For all its plastic theatricality, it hews to authenticity: The chief dish, cooked to order, is sustainably caught and sourced from third-generation fishmonger T. Bush at Billingsgate Market. For those whose palates swerve differently, there’s also chicken, the chance to try jellied eels, and Minghella ice cream hailing from the Isle of Wight. There’s a Soho location (55 Old Compton St., W1; [tel] 020/7734-4845; same hours) for strolling the West End with chips.