So, what does it all mean? A sleep expert offers her thoughts

Dr Nerina Ramlakhan, sleep expert and professional physiologist, says: “You seem to be stuck in what I call a ‘fatigue cycle’ – you’re not eating properly (particularly breakfast) and you have a busy life which you’re not fuelling adequately for, so you’re tired in the mornings and needing caffeine to get going and then an energy drink later in the day.

“Eating a good nutrient-rich breakfast is so important for our sleep and energy levels and mood throughout the day – this is why it is probably the most important of my five non-negotiables for a good night’s sleep.

“These days, with intermittent fasting being so popular, I’m seeing too many people skipping breakfast and/or fuelling up on caffeine at the start of the day and then getting energy slumps and poor sleep.”

“I sleep OK but my energy levels dip throughout the day – how can I feel less sluggish?”