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My interpretation is...
I live in Romford. Romford is massively white/working class/right-wing. If my neighbours were making a curry, they'd reach for the Pataks/Sharwoods. It's more likely that ham, egg and chips would be on the menu though in reality (to be clear there is absolutely nothing wrong with ham, egg and chips - unless you're not into eating animals)
Elsewhere people may be more adventurous.
This has nailed it