Re: Possible error?
I work in the industry of pensions and this all comes down to how the rules of the pension scheme where written (probably back in the 70s).
MANY schemes intended for RPI to always be used, but instead wrote, "pensions will increase by a measure of inflation as decided by the Trustees". CPI didn't exist back then, but by the scheme rules it can be used.
Also many schemes wrote, "pensions will increase in line with inflation of the Retail Price Index." This was intended to be the same thing as the paragraph above, but now by law they HAVE to use RPI.
So now any scheme that can switch to CPI has done, and BT tried to say, "well that's what we intended" and the court correctly said piss off.