You asked
How many sleep studies have been performed in each of England, Scotland Northern Ireland and Wales per year, from 2010 to present?
We said
Thank you for your enquiry.
Unfortunately we do not hold any information on this subject. You may be able get information from NHS Digital (https://digital.nhs.uk/), NHS Scotland Information Services Division (http://www.isdscotland.org/), Department of Health Northern Ireland (https://www.health-ni.gov.uk/topics/doh-statistics-and-research) and NHS Wales Informatics Service (http://www.infoandstats.wales.nhs.uk/).