I know some providers only normally put one ice pack in their packaging and are doubling up next week.
In 2 years I have been getting deliveries it is a small minority that has arrived with ice blocks still frozen, always in winter months. Maybe it was a provider issue 🤔. I have switched to Swift Doctor and their 2 deliveries so far were frozen in spring, but I'm on an order break over summer to use up stock pile.
Perhaps Boots has some issues with getting enough ice or cost/resources has driven their decision.