Is 1P-LSD legal in United Kingdom?

Legal status

1P-LSD is caught in the UK by the blanket Psychoactive Substances Act 2016; whether it also falls within the Misuse of Drugs Act 1971 Class A entry 'lysergide and other N-alkyl derivatives of lysergamide' is contested, because 1P-LSD's N1-propionyl (acyl) group is not clearly an N-alkyl derivative, so the operative national control is the PSA 2016 blanket-NPS ban.

Consequences if caught

Under the PSA 2016, producing, supplying, importing or exporting 1P-LSD carries up to 7 years' imprisonment; simple possession for personal use is not an offence except inside a custodial institution. If a court treated it as Class A under the MDA 1971, possession would carry up to 7 years and supply up to life.

If prescribed or medical

No authorised medicinal or prescription use; lawful handling only under a Home Office licence for research or other special purposes.

Documentation

Confirmed via the Psychoactive Substances Act 2016. The MDA 1971 Class A lysergamide entry individually captures named LSD analogues (ALD-52, AL-LAD, ETH-LAD, PRO-LAD, LSZ, controlled 7 January 2015) but does not name 1P-LSD.

Drug laws and enforcement change and vary within a country. This is not legal advice. Always confirm with United Kingdom’s embassy or official drug authority before traveling; penalties can be severe, including imprisonment.