Is the U.K.'s traditional fish and chip supper under threat?

For over a decade Brockley’s Rock in south east London has been serving customers from its Lewisham shopfront, after opening in 2011, building on experience in the trade that dates back to 1989. But what cost £1.65 for haddock and chips when the founder first entered the trade in 1989, and £5.90 when this shop opened in 2011, now costs £15.55 for a typical portion of haddock and chips served with mushy peas.