Jamie Goldsmith QC, James Fox and Ben Zelenka Martin have written a note about the operation of force majeure clauses in the context of COVID-19. It explores: (i) the circumstances in which a party might be able to rely on a force majeure provision; (ii) the impact of COVID-induced supply constraints; and (iii) whether deposits and advance payments would have to be repaid in the event of force majeure.
You can view the note here.