Let's still blame brexit for everything and ignore what's happening globally. The global economy isn't in great shape, plenty of EU and international countries suffering from rampant inflation too. We've just had a major bank (Credit Suisse) getting a bailout recently, trying to avoid another banking collapse. There are bigger things going on that if they come to pass will dwarf brexit.
And the cost of living increase is down to rising inflation - which is not a brexit issue as inflation has been rising globally due to supply and demand issues post pandemic.
Our energy bills have increased significantly when Russia invaded Ukraine. That isn't down to brexit. We placed sanctions on Russia so we end up importing less oil from Russia. So we then have to get it from somewhere else and so do all the other countries in the EU who placed sanctions on Russia too. So if you have fewer sources and more demand of course prices are going to increases.
Rising energy costs put inflationary pressure on other goods and services because the cost to produce the goods or provide the services is higher.
For example, the cost of food might increase as a result of higher energy costs due to the higher costs of refining and transporting the item to your grocery store.
Then the bank of england has to respond to the rising inflation and then puts up interest rates which affects your mortgage costs makes borrowing more expensive. They have to do this because when people have less money to spend, they buy fewer things, reducing the demand for goods and slowing price rises.
So its simply demand supply problems post pandemic thats been fueling global inflation.
But hey lets blame the current state of our cost of living on brexit when reality its because of the pandemic.