They work mainly in hospitals or sleep clinics where they monitor patience overnight using special equipment that tracks things like brain waves, breathing, movement during sleep.  They set up the tests, watch for any issues, and collect data for doctors to review.  It's a job that combines caring for people with technology and science.

To become a sleep technologist, it helps to have science A-levels and a degree in a subject like physiology, healthcare science, or clinical physiology.  Most people enter through healthcare science training programmes, or get experience in related areas, like respiratory or neurophysiology.

The yearly salarly depends on experience and the hospital or clinic worked at.  Someone starting out in the NHS might earn between £25k-£28k a year.  With more experience, this can rise to around £35k or more.  Senior technologists or those with specialist skills can earn higher salaries, especially in larger hospitals or private clinics.