There have always been claims that the stones of Stonehenge originated from the Preseli. A recent study published in the Antiquity journal claims that that the stones originally stood as a stone circle at the Waun Mawn circle and at some point were dismantled and transported to Salisbury. The circumstances of this removal are impossible to determine therefore it would be prudent that they should be returned to their original location.

The return of these stones will be an economic and social benefit to the people of Pembrokeshire and Wales

This article gives further details:

https://www.cambridge.org/core/journals/antiquity/article/original-stonehenge-a-dismantled-stone-circle-in-the-preseli-hills-of-west-wales/B7DAA4A7792B4DAB57DDE0E3136FBC33