WHSmith is the latest chain experimenting with what to stock at the counter after next year’s high in fat, salt or sugar promotions ban.

After October 2022, chain, symbol and franchise stores larger than 2,000sq ft cannot display unhealthy lines at checkouts, entrances and gondola ends.

A spokesperson for WHSmith said: “We are conducting a small-scale trial in our high street business to introduce electrical accessories and other impulse products in our queue management systems.”

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