As forexgump says CPI is usually perceived as a leading indicator of interest rates, Central Banks over the years have used rates in a response to CPI - thus as inflation has been on a downward trajectory then so too interest rates.
When there was recent talk (back a couple of years) of deflation so also there was talk of minus interest rates.
CPI is now on the up, so too rates, but you have hit the nail on the head with UK numbers.
Context is king, CPI is rising not because of increased wages or increased productivity or increased consumer spending, the 3 wise kings that often drive CPI - it’s being driven by… well the effect of the uncertainty currently doing the rounds.
Sad to say but there are quite a few companies taking advantage of that uncertainty via pricing.
So yes, CPI positive ‘should’ mean a buy on GBP …but I’d be careful.