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

Dr Nerina Ramlakhan, sleep expert and professional physiologist, says: “It’s lovely to be able to help a fellow open water swimmer! You’ve got some good habits but there’s room for improvement, particularly given your epilepsy. You’re spot on in understanding that sleep is going to be the key to managing your condition, but unfortunately you’re not making the choices that will help you to get the kind of sleep that you need.

“Where do we start? You definitely need to take on board my five non-negotiables. You don’t appear to be eating breakfast everyday, and you’re fueling yourself on caffeine. This isn’t working for you at all as your energy levels are yo-yoing, especially at certain stages of your cycle.

“I don’t want to be a killjoy, but you really need to be off your phone and switch the lights out earlier. That 90-minute phase of pre-midnight sleep is going to be absolutely crucial for you given your epilepsy and need for optimal rest – I can’t stress this enough. An electronic sundown at least an hour before you get into bed will really help you to fall asleep easier.”

“How can I stop my energy levels from fluctuating all the time?” A sleep expert answers your questions