Could the fact that it's the 'Human' (not the 'Investigational') Legal Basis be linked to the MHRA manufacturing inspection related to the approval process? Senti and another MB member seem to indicate a 'delayed' inspection or such a bit earlier. Cheers!
I suspect that the Class C cleanroom has been fully completed and is now included in the updated MIA, and it is likely to be included in an updated GMP certificate as well.