I get the impression when the first lockdown happened and we couldn't get any baking ingredients, there was a brief lull before it was all back in the shops again. Marks and Spencer's in particular may have over bought because a short while ago they were selling McDougall's flour at marked down prices, I stocked up then, I also bought an enormous 3kg bag of icing sugar that they were selling off half price which should do me for birthday cakes for the foreseeable future.
I'm kicking myself though because I went to Sainsburys yesterday where they had plenty of everything but forgot to buy brown sugar and have just realised we are running low on that. Oh well if it's all gone by the next time I go will have to use golden caster, or muscovado, can't be helped!