Of course if the film is being bought as frame numbered bulk, it would also have those numbers.
It is not clear that the Kentmere is the same as Ilford Pan. Simon indicated that it was a new formula, as they did not want to break their policy of not private labelling their own products. Ilford Pan 100 and 400 are special lines sold in "Certain Countries" where the "distribution conditions are not ideal" And are possibly sold at a different price than the Normal HP5+ FP4+ line. I have not tried the Ilford pan 100, but the Pan 400 does not have anywhere near the same development recommendations as the Kentmere 400. the roll I got from a dealer in asia does have a bit of resemblance to the HP5 of Old.Kentmere 100 (aka Ilford Pan 100