Just based on bluelight posts alone that seems accurate to me. There have been a few reports in EADD of 'heroin' ordered on the darknet testing positive for nitazines and it's coming up more and more in mainstream media.Its my understand that the UK's nitazene problem is shaping up to be similar to the fentanyl problem in the US so far. Well, it sounds like the beginnings of how the fentanyl problem started in the US anyway. I could be wrong, but that is what it sounds like from the webinars I have listened to on drug consumption throughout Europe as well as the data I have seen on it and information I have gained here.
Does this seem accurate to you??
For example:

Nitazenes are spreading like wildfire, drug charity warns
Grieving siblings in Essex are raising awareness of nitazines after their father's death.

That's from the beginning of this month.one of 179 people in England recorded as having died from nitazenes in the past year, with the highest number of deaths occurring in the East of England