Ryanair said all of its aircraft were stocked with two security-sealed first-aid kits, as required under the regulations.
When our UK charter airline started many years ago we had a sealed first-aid kit. The restocking and resealing was done under the engineering contract and cost £150 per time plus items.
Most flights needed the kit resealing after each fkight where perhaps one paracetomol had been taken out.
After five years of this someone cottoned on and the cabin crew took on an unsealed kit of obvious pills and bits to be restocked from Boots at leisure.
Eventually a Doctor's kit was put on which was sealed as it contained drugs that could only be prescribed by a physician.
In the interim there was an obvious reluctance to break open a sealed kit with the inherent high cost and this may have been a factor in this incident.