It's the fault of BREXIT you know.
So is the rain, the hail, the snow, the unrest in the middle east, meteorite showers, third world problems, wars, every disease on the planet, global warming, shark attacks, the ivory trade, toothache, trapped wind, athlete's foot, earthquakes, and tornadoes. It's ALL the fault of that Brexit!
Food prices have never increased before that Brexit, and there has never been any sign of any recession before that Brexit, not any unemployment before that Brexit. Damn that Brexit... GRRRR! 
You could try going to a cheaper store (eg, Aldi or Lidl!) My food shop is literally HALF of what it used to be when I shopped in Tesco and Sainsbury's. (And the quality of the food is just as good, and often better.)
Luckily I have an Aldi AND a Lidl in the town near me. 10 minutes walk from each other. They both do amazingly well.