No, diabetes is one of the conditions for which medication is supplied completely free of charge in the UK. Diabetics don’t have to pay the £9 prescription charge.
The NHS itself buys its insulin at around the £16 - £20 mark for a 10ml 100 units/ml ampoule (The price varies according to exact product, but that price represents the typical products used by most type I diabetics. Search for the UK National Drug Tariff if you want the full details.).
