I'll see what I can get when I next meet. It's fairly complex and takes in many factors.
In a nutshell though, the 40% is partially based on GBP VS USD. US Fed are going to take on a very aggressive monetary tightening policy which will see interest rates ramped very high, and with QT, will make the USD much stronger. The UK and EU are not going to be anywhere close to the Fed in terms of rate rises, and with more stimulus (highly inflationary) to try and "manage" the energy crisis, both GBP and Euro have much further to fall. As everything is priced in USD, UK and EU customers are shafted. The governor of the BOfE had tried to talk the markets out of inflation, but they're having none of it as it's boss (US Federal Reserve) have called them out big time.
World demand will increase VS supply. Unfortunately for the UK and EU, the demand will be in the US who will be better placed to pay more reasonable prices given their stable currency. A hyperinflated currency like the GBP and Euro can only ever mean higher prices, so unless you get that significant pay rise, you will go without.