Some vendors try and offer a "repro" of an item by "careful or clever" wording of the advert/listing without actually, explicitly, stating that the item in question is, in fact, a repro. In the UKit may be the use of the word "pattern" and possibly where it is placed in the description. Confusion can arise in the mind of the "punter" when he/she incorrectly believes that the word "pattern" is being used to described a generic style of something, by the vendor, for example, 1907 bayonets, when in actual fact the vendor is using the term to avoid the use of the term "repro/reproduction".
Obviously don't make the "schoolboy error" of assuming that a "Pattern 1907 bayonet" and a "1907 Pattern bayonet" necessarily refer to the same thing because they may not do. One may refer to a repro and the other an original but equally they may not do.