@charlotte you can literally purchase them whenever you please, my last check up at the clinic was the pre op with the nurse and that was on 10th April and that’s when I then just asked the nurse see if I could purchase me some and she took me to reception to get it all sorted which legit took 3 mins and they came in next 2 days. You can ask reception, your pc or the nurse at any point. Whenever you want to purchase them, it has to be before your actual op date though for you need to take at least 1 of them to your actual operation with you xx
