The RPI is currently ~12% and CPI ~10%. Once winter energy use kicks in even with the domestic and business capping these will go up.
Right now against the lower CPI anything less than 10% is a real loss e.g. 2% interest is an 8% loss before considering tax deductions outside of an ISA and the £1000 allowance.
Stocks and shares are even worse as many funds have dropped rather than grown over the last 12 months. A drop of 5% is a real loss of 15% against the CPI.
The railway unions are currently concentrating on salary plus terms and conditions. How long before a real drop in pension funds values becomes a headline issue?
Including commodity price inflation, the depreciation in the currency, and the fact that the government measures of RPI/CPI are inapplicable to many who don't buy "small caged mammals" on a monthly basis, (yes, that is in fact one of the inflation items). True inflation is well north of 20%.
For those of us who watch the grocery bill closely, 9% inflation is a bad joke. 9% a quarter maybe. And if its not prices rising, its the size of the portions that are getting drastically smaller.
Rising mortgage rates will feed inflation, as will rising real oil prices, given Sterling now buys you 20% fewer dollars than 6 months ago.
As for pensions, some are fortunate enough to have the option of investing their pension in market funds with little to no exposure to UK equities which are now some of the most depressed on a valuations basis, in the developed world.
The Bank of England is now forced to act. Implied rates are over 4.5%. The base rate is 2.25%. We won't see 15% base rates IMHO, because that would render millions of people homeless. Personal indebtedness is now far higher than in the 70's, a lot else has changed in half a century.
4% base rate by Christmas seems plausible. That would translate to 6% mortgages, which is really going to hurt if all you've ever known are 1-3% mortgages.