The 'Marmite drought' triggered by a shortage of brewer's yeast during lockdown looks set to end as the reopening of pubs boosts beer production. Production of Marmite relies on brewer's yeast - a by-product of making beer - which has been in short supply since the initial closure of the hospitality industry in March 2020. Shoppers had been left in despair by the supply issues that left supermarket shelves in many parts of the UK Marmite-free or with very limited supplies - forcing some to resort to buying the 'love it or hate it' spread online. But Marmite supplies are now slowly returning to previous capacity as pubs begin to re-open amid the easing of restrictions.