Collector's Loot Returns to Cambodia from UK

Over seventy looted pre-Angkorian and Angkorian objects including crowns, necklaces, bracelets, belts, earrings and amulets have been returned to Cambodia from the UK according to a statement from the Cambodian Ministry of Culture and Fine Arts (Lim Nary 77 Cambodian Pieces Of Jewellery Collection Return Home AKP Phnom Penh, February 20, 2023)

The Ministry of Culture and Fine Arts on behalf of the Royal Government of Cambodia (RGC) reached an accord with the family of the late Douglas Latchford in September 2020 wherein all Cambodian artefacts in the possession of the Latchford family will be returned to Cambodia.
The collection, which arrived in Cambodia on Feb. 17, 2023, include gold and other precious metal pieces from the Pre-Angkorian and Angkorian period such as crowns, necklaces, bracelets, belts, earrings and amulets, a number of which have been featured in the book Khmer Gold: Gifts of the Gods, co-authored by Mrs. Emma C. Bunker and Mr. Douglas A.J. Latchford (2008). Many of the objects have never been seen by the public before.

No mention is made of any paperwork accompanying the objects, do we know which sites, even, any of this stuff came from?