It seems like a long time since the supermarket shelves were looking rather sparse.Pasta, toilet roll, all the essentials we took for granted were being snapped up like hot cakes.But while all that is now seemingly back to normal, it turns out lockdown has caused a shortage of one cupboard friendly item - and you either love it or hate it.You have probably guessed we are talking about Marmite and while it is not for everyone, some may have noticed a lack of larger jars of the stuff on their supermarket shop.The company has admitted in a tweet to a customer that due to coronavirus pandemic.The spread, made with yeast extract, is now only being produced in a 250g size jar as a result of brewers' yeast being more difficult to get hold of.In.