I'd also wonder about the "age cohort question"; that is, whether it's a parking lot for the UK equivalent of the kinds of young European (particularly male) voters who've been drawn to the "identitarian right", and for thom the Tories are just some stale old thing a la France's Les Républicains...
Those Redfield and Winton crosstabs are a real outlier compared to virtually every other poll, which has shown Reform as having a sharp positive age gradient — as you’d expect from a party by all accounts drawing most of its support from right-wing Tories. Considering R&W’s extensive history of dodgy crosstabs, I’m very much disinclined to believe them against all that other evidence which suggests Reform will poll negligibly with young voters.