Experts call the hours we lose in our midweek rush “sleep debt”.

Most of us – roughly one in five Brits, according to Mental Health UK – aren’t getting enough sleep at night.

The NHS recommends between seven and nine hours for most adults; but between work, stress, kids and sleep disorders (or an ungodly combination of the lot), not all of us can reach that benchmark – especially in the week.

Experts call the hours we lose in our midweek rush “sleep debt”. It’s sort of like you’ve “withdrawn” too many waking hours from your body’s circadian “bank account”.

Sadly, it seems trying to catch up on the deficit by snoozing all weekend won’t cut the mustard........

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