Kusterer,
I don't have any insight into the cost structure at King's college, and I'm not an insider in drug manufacturing. My pure guess would be $100K to $200K, by a slow, cheap, manual labor processing way.
Generally the cost of manufacturing of a drug during a clinical trial or even at initial launch under low volumes will always be multiples higher than at normal production levels.
The formula roughly:
+ incremental direct costs
+ an allocated overhead costs
+ amortized fixed costs
+ cryogenic shipment
+ rush fee surcharges
+ pricing based on low volume purchasing (shipping, supplies)
+ inefficiencies of mistakes/waste
= total cost
Divide by the number of units produced
= The cost to manufacture 1 batch, fully loaded cost