All NHS research involving people has to be approved by a Research Ethics Committee (REC).
It is the job of these committees to protect the rights and interests of the people who will be in the trial.
Each NHS Research Ethics Committee is made up of between 12 and 18 volunteer members.
At least one-third of the members must be 'lay'; half of the lay members must be 'lay plus' members.
Lay members are people who are not registered healthcare professionals and do not conduct clinical research.
Lay plus members are people who have never been care professionals, researchers in a care field, or chairs, members or directors of care service bodies or organisations providing care.
The remainder of the committee are expert members, who are specialists including doctors, other healthcare professionals and academics.
Each Committee has a Chair, a Vice Chair and an Alternate Vice Chair.
Each year, RECs review around 6,000 research applications.
On average, they give an opinion in less than 40 days: well within the maximum allowed of 60 days.