Chronotype of Patients With Diabetes and Effect on Glycaemic Control

Inclusion Criteria: 1. Participant is willing and able to give informed consent for participation in the study 2. T1DM or established T2DM (\>6months since diagnosis) 3. Male or Female 4. Aged 18-75 years inclusive 5. BMI less than or equal to 45kg/m² inclusive 6. No known sleep disorders except Obstructive Sleep Apnoea (OSA) 7. On any glucose-lowering therapy (T1DM or T2DM) or lifestyle modification for management of T2DM 8. Good command of the English language Exclusion Criteria: 1. Participant is unwilling or unable to give informed consent 2. Anyone without a good command of the English language 3. Anyone \<18 years of age and \>75 years of age 4. BMI greater than 45 kg/m² 5. A regular cannabis user i.e. weekly use 6. Have a terminal illness 7. A known sleep disorder that is not OSA 8. Regular use of the following medicines i.e. Weekly use: (Wakefulness promoting agents Modafinil, Amphetamine derivatives, Methylphenidate; Sedatives including benzodiazepines, Z-drugs (zopiclone, zolpidem \& zaleplon); Melatonin, including Circadin and melatonin analogues; Clonazepam and other drugs for nocturnal movement disorders).