The force released a statement here. It mentions sharp objects have been found behind the stickers.
They warned the public not to try and remove stickers because broken glass and pins had been found underneath them. They worded it very carefully so that everyone would assume they were talking about stickers posted by Jenni, as the BBC and ITV assumed, but covered their arses by not actually coming out and saying it directly. They have obviously failed to do even the most basic of investigations, (or they would have quickly realised that the informant serving them that persistent urban myth was not to be trusted).
Hopefully they will end up having to pay out hefty compensation for smearing Jenni in such a devious and underhanded manner. The people officially responsible for the wrongful arrest, brutality, cruelty and discrimination against a disabled person, and general lack of understanding of the actual law need to be held to account, and there are obviously a lot of us who feel the same way, judging by how quickly the fundraiser has grown.
Gwent police obviously need to get some proper equality and diversion training organised, because, as Jenni told them at the time, they've been Stonewalled.
Bad enough that they wasted tax payers money on getting that mendacious shower in to "train" them on "equality law as Stonewall wishes it to be", but now they are going to waste even more tax payers cash defending the indefensible in court, then paying compensation AND then paying to get training in from a more reliable and trustworthy source, in what UK's actual equality law at the current time, including all of the protected characteristics (which cover sex and disability, but does not include "gender identity").