Inflation spike and falling product variety during the Great LockdownThe COVID-19 pandemic led many countries to implement social distancing, lockdowns and travel restrictions, which have resulted in a collapse in the world economy unprecedented in peacetime. Although the real-time effects of the ‘Great Lockdown’ on employment and consumer expenditure have been widely documented, much less is known about how the crisis is impacting inflation. In this paper, we use comprehensive scanner data from the United Kingdom to measure inflation for fast-moving consumer goods during the Great Lockdown in real time.