It is the final protection system to be used when administrative and engineering controls do not reduce risk to an acceptable level.
One of the strengths and weaknesses of Oxford is that it is not a top-down university: what is taught is largely decided by what dons want to teach.
Was Cameron a compromising or radical Tory? They should also know how to clean and inspect the gloves, and how to properly dispose of a glove that cannot be decontaminated.