Gilly I did read your post, but my comment included Boots
Allowing each customer a limit ( I just didn’t add that bit.)
The manager is in a quandary, he cannot refuse to sell to Chinese customers, and if course they could ( and perhaps do) go into the store several times a day.
Limiting each customer to 5 and holding a large stock of formula ( in the back) is one way, other than that, to make sure that local mothers have enough, the tills which are computerised anyway, could be made to show if a person has purchased it that same day.
Other than that, if Boots won’t do anything about it, do the local Chinese people buy it up in Tesco, Sainsbury and other outlets too?