If the system changes such that schedule 1 has different rules, but is still called something equivalent and matches up roughly to the UN schedules, I will still count it as 'in schedule 1'.
If schedule 1 no longer exists in recognisable form then resolves 'Yes'.
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3.00@ElliotDavies There are both schedules and classes in UK law on controlled substances. They are for different purposes, I won't go into it here as it would be lengthy but look up the Misuse of Drugs Act and the Misuse of Drugs Regulations.
Schedules are what determine how strict controls are for use in medicine or research. Schedule 1 is for substances with 'no medical use', research can be done under strict conditions with a licence.
@CromlynGames It is not used by doctors except in research. Heroin and morphine are not in schedule 1 . Psilocybin is more strictly controlled than heroin, cocaine, amphetamine, methamphetamine, barbiturates, ketamine.