Researchers identified multiple factors that might have contributed to the deaths.

These include having experienced bereavement, relationship problems or breakdown; having long-term physical health problems, including asthma and acne, family problems, self-harm, bullying, and alcohol or drug use.

It's unclear if any single factor was a cause of death. It could be possible that in many cases multiple risk factors triggered suicidal thinking and behaviour.

However, we cannot be sure that these factors contributed to the deaths of the children and young people involved in all cases. This is partly because they are very common.

For example, the study showed that 27% of those who died had experienced exam stress or other academic pressures, but we don't know what proportion of under-20s in the general population also experience exam stress.