By Steve Hatch As John Lewis appoints a new chair, how have the brand’s public perceptions changed over the past few years? Jason Tarry will take over as Chairman of John Lewis Partnership in September of this year. The ex-Tesco UK chief replaces Dame Sharon White who, in October 2023, announced plans to step down at the end of her initial five-year term. With a new era for John Lewis approaching, how has opinion of the department store brand changed over White’s tenure? YouGov BrandIndex shows that Impression scores – which track on a daily basis the proportion of consumers who have a positiv…