After the Budget, Labour could conceivably drop to lower than 12% which must be a floor level for them.
Reform are probably under represented by the polls due to the 'shy Tory' factor which I believe is present in some Labour voters. This certainly will a factor in the Conservative reading of 17% which I think is very soft.
Thus the Find Out Now Poll could be undervaluing Reform by about 3%. However, if you are Bill Rammell you can deluded yourself by looking at the establishment You Guv numbers.