There's a Chemists' Own for that

Chemists’ Own Melatonin 30s

Alternative to Circadin

https://www.high-endrolex.com/46
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Supports sleep quality, wake feeling alert.

 

Improves sleep quality.

Short term treatment of primary insomnia (without an underlying medical or any other clear cause) , characterised by poor quality of sleep, in adults aged 55 years and above. Not to be used concurrently with other treatments for insomnia.

Melatonin 2mg

Adults aged 55 years and over: Take 1 tablet daily, 1-2 hours before bedtime and after food. Swallow whole. Do not crush or chew.