Yes, XX (2017) is free to watch on Prime Essentials in the UK with no subscription required.

Where can I watch XX in the UK?

XX (2017) is available to stream on Prime Essentials, Amazon Prime Video, Plex in the UK.

Is XX on Prime Essentials UK?

Yes, XX (2017) is currently available to stream on Prime Essentials UK.

Yes — it's on Prime Essentials

Available to stream now

RHorror· 1h 20m· ★ 4.6

This all-female horror anthology features four dark tales from four fiercely talented women.

Is XX free to watch?: Yes, XX is free to watch on Prime Essentials in the UK with no subscription required.
Where can I watch XX in the UK?: XX is available to stream on Prime Essentials, Amazon Prime Video, Plex in the UK.
Is XX on Prime Essentials UK?: Yes, XX is currently available to stream on Prime Essentials UK.