SI 2017/632 The Misuse of Drugs (Designation) (Amendment) (England, Wales and Scotland) Order 2017 (link)
The controlled drugs specified in Part 1 of Schedule 1 of the Misuse of Drugs (Designation) (England, Wales and Scotland) Order 2015 (link) are designated as drugs to which section 7(4) of the Misuse of Drugs Act 1971 applies. This Order amends the 2015 regulations by inserting a synthetic opioid (U-47,700), several methylphenidate related materials and a number of designer benzodiazepines into Part 1 of the Schedule to that Order.
Source: HMSO