Shrinkflation - the sneaky practice whereby food packs decrease in size but the cost stays the same. Watch out for those odd weights that are not a standard increment of 50g. Here's two I spotted yesterday
Primula cheese spread - pack size down from 150g to 140g.
Equivalent 6.5% increase in cost
PG teabags - pack size down from 250g to 232g.
Equivalent 7.2% increase in cost