Why Bloodhound is obsolete but domestic missile development still matters

Would the Bristol Bloodhound missile be useful for twenty-first-century British air defence?

Not in its historical form, but a newly developed domestic missile serving the same broad need could be useful.

Bloodhound itself is rejected as a useful modern British air-defence system because it belongs to an earlier generation. A domestically developed contemporary missile is considered potentially useful. Other participants then joke about the effect of putting modern explosives into such a large weapon. That exchange does not establish a practical modernization proposal or overturn the initial rejection.