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The Daily Telegraph reports that Tesco are contemplating using data collected via Clubcards to issue health messages to shoppers:
Tesco could use Clubcard data to warn shoppers when they are buying too many unhealthy items, its chief executive has said. The boss of Britain’s biggest supermarket said he expected to use artificial intelligence (AI) to monitor how customers were shopping to help “nudge” people into making healthier choices.
Tesco’s Ken Murphy said: “I can see it nudging you, saying: ‘look, I’ve noticed over time that in your shopping basket your sodium salt content is 250pc of your daily recommended allowance. I would recommend you substitute this, this and this for lower sodium products to improve your heart health’.” He said this was “very simple stuff” which could “really improve people’s daily lives”.
Some people might welcome a little friendly advice along these lines, but many others will regard it as a somewhat sinister, Big Brother-like intrusion into their privacy. There is also the issue of needing to see each trolley-load in context. It’s entirely possible, for example, that someone might buy fresh food at a market, and only use the supermarket for packaged items, which could lead the algorithm to conclude they had an unhealthy lifestyle. And that slab of Madri might not be all for your own consumption. I doubt whether the shopper depicted in this cartoon strip would find favour…


I regularly shop at Tesco, and have had a Clubcard for many years. I recognise that it involves some sacrifice of privacy, but as long as the data is anonymised and it doesn’t trigger third-party advertising it’s a compromise I’m prepared to make. I get a voucher for a few quid every three months, and sometimes they send me coupons for money off things I actually buy.
However, they don’t really have a proper handle on my shopping habits. From time to time, they send me vouchers offering £6 off if I spend £40, but the big catch is that this excludes alcoholic drinks. Not that I buy nothing else, but my regular bill is nothing like that, and if I’m splashing out a bit at Christmas the odds are that I’ll want to include a nice bottle of wine or malt, possibly as a present for someone else.
More recently, they have started offering in-store discounts to Clubcard holders, including the multibuy offers such as four bottles of beer for £7. This comes across as a slightly unethical tactic to encourage people to sign up for Clubcards, but as long as I actually have one it works to my benefit.
However, I’ve thought in the past that if they started sending me discount coupons for vegetables, I would cut it up. What I choose to buy is none of their business, and delivering patronising lectures on my shopping habits would be completely unacceptable. If they introduce this system, and there isn’t the ability to opt out, then I would have to accept that my weekly shopping might cost me a bit more. Although I would probably then be motivated to regularly use Aldi or Lidl, who don’t bother with loyalty cards at all.


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