In this recent United Kingdom Supreme Court judgment discussed here, in addition to considering the meaning of “catastrophe” in the context of the Covid-19 losses and the treaty wording, the application of the “hours clause” was also considered. 

The reinsurers argued that even if there was a catastrophe only business interruption

There is a substantial body of English case law explaining the import of a contrast between different aggregation clauses.

AXA Reinsurance (UK) PLC v Field (1996) 1 WLR 1026 at 1035 contrasted the words “arising from one originating cause” with the words “arising out of one event” used to define the unifying factor used in