To ask Her Majesty's Government why the Cranfield University study on incidents of fume events in aircraft did not include a requirement for a neuropsychological study.

We are following the advice of the Committee on Toxicity (COT), which saw the logical first step as research to examine potential exposure. This is currently proceeding.

When we know what is in cabin air and in what concentrations, then we can begin to make judgments about any need for, and the possible design of, epidemiological studies.