I like that you guys seem to have a sound plan for dealing with this, though I wonder why they use a hierarchy for disseminating information to smaller and small scale pharmacies. Wouldn't it make more sense that all pharmacies should be notified by one central body both for expediency and for reducing the margin of error that one of the links in the chain might goof?
I suspect the reason is actually fairly simple. In the case of a major recall, speed of confirmed communication is paramount. Hierarchy means that one organization isn't simply trying to contact everybody for personal handoff, but is instead multiplying its capacity by creating a cascade effect. If every pharmacy in the country was centrally registered with emergency contact details, this procedure could probably be done away with, but protocols take a long time to change, even when they're no longer valuable.
Another possibility is that due to devolution of powers, including medicine, the hospital pharmacies and PCTs are the authorities which are responsible for maintaining a list of practicing pharmacies in their area. If that's the case, it's a no-brainer to have them send out the notification, since they're the final arbiters of truth regarding registered pharmacies.
Either option seems plausible to me.