That seemed high, so I plugged it into the bank of England's inflation calculator[1] and got:
> What cost £85.00 in 1957 would cost £1,796.12 in November 2025.
Not orders of magnitude off, but makes a little more sense this way. I wonder if there's a bug in wikipedia's inflation calculator.
[1] https://www.bankofengland.co.uk/monetary-policy/inflation/in...
The template references a site which uses the Retail Price Index[1] (even though it says it uses the Consumer Price Index?), Bank of England uses the Consumer Price Index. Over such a long period a difference of 30% doesn't seem that much.
[1]: https://en.wikipedia.org/wiki/Template:Inflation/UK/dataset