I'm pretty sure OL is manufacturing these particular items specifically for the UK market, as they still do with their SARMs. The site in question is an OL authorized retailer, so the products definitely come from OL (they would have been sued by now if this wasn't the case). I've heard from a person here whose opinion I trust that OL's Halo 100 is either underdosed or maybe even methylclostebol. Perhaps, OL is no longer as trustworthy as they once were.
Also, I haven't taken Trenavar, but I had always heard that it shines in the 120-150mg range, with some running it even higher. Remember that, unlike many designer steroids that are incorrectly labeled as prohormones, Trenavar actually is a prohormone, so only a fraction of that dosage actually converts to trenbolone. The amount that does will also vary amongst individuals.