The UK MEC helps clinicians decide what contraceptives they are able to safely recommend based on the medical conditions of patients in their care. This key guidance is informed by robust and up-to-date evidence on when contraceptives can and cannot be safely used. Where evidence was lacking, FSRH took care to obtain professional input from leading UK experts in each relevant field. The 2016 edition has been carefully constructed for clinicians living and working in a 'one-click', digital age. Clinicians are also able to access a searchable online version of the UKMEC. The new online UKMEC facilitates effortless navigation, with features that cross reference the UK MEC with other clinical guidance documents. The digital and pdf versions of the UKMEC 2016 (available at www.fsrh.org/ukmec/) have been updated to include a change of UKMEC category for use of progestogen-only injectable contraception by women at high risk of HIV infection from UKMEC1 to UKMEC2. A full statement of this revision is available at the same weblink and should be considered alongside the printed UKMEC 2016.