The most authoritative and relevant evidence comes from official UK statistical sources, specifically the Office for National Statistics and the Commons Library briefings, which directly report January's Consumer Prices Index (CPI) data. The summaries indicate that these sources contain precise figures for the inflation rate and confirm the percentage changes for January. While some sources are more contextual or indirect, the ONS data referenced explicitly covers the official CPI inflation measurement and aligns strongly with the claim of a 3% rate for January. No contradictory evidence is presented, and the central bank commentary reinforces the plausibility of the rate without disputing it. The combination of high authority, direct relevance, and absence of conflicts leads to a high confidence that the statement is accurate.