The Glamorgan-Gwent Archaeological Trust

GGAT is one of the four Welsh Archaeological Trusts, established in the mid 1970s with the object of educating the public in archaeology.

The Trusts are based on the county areas of Clwyd-Powys, Dyfed, Glamorgan-Gwent and Gwynedd. We provide a large range of archaeological and heritage services, including the management of the Historic Environment Record, undertaking archaeological research, excavations, survey, publishing reports, the production of advice, information, training and the presentation of knowledge. The Trust is an independent limited company with charitable status that employs professional archaeological and heritage staff.


Planning Services

Our archaeological planning management team ensures the maintenance of high archaeological standards and best practice.

Heritage Management

There is a growing awareness for the need to preserve and maintain the cultural heritage for future generations. 

Historic Environment Record

Historic Environment Record (HER) is the official register of archaeological and historical sites in Southeast Wales.

Archaeological Services

GGAT Archaeological Services have nearly 50 years of archaeological field work experience.


Archwilio provides public access to information on tens of thousands of historic sites or investigative work across Wales.


July 7, 2022

Weslyn Chapel, Llantwit Major

GGAT are excited to be contributing to the renovation and conversion of the Wesleyan Chapel at Llantwit Major. The chapel was built in 1847 and was used for religious worship for over 150 years, but in recent years has been unoccupied and falling into disrepair. Regeneration Design and Management are […]

3D model of the Cardiff Castle ‘Dodecahedron’
July 7, 2022

The Cardiff Castle ‘Dodecahedron’

In 2006, GGAT undertook major archaeological excavations inside Cardiff Castle – which is the site of four sequential Roman forts and a medieval castle, the latter converted into a mansion by the Bute ironworking dynasty. The ‘post-excavation’ programme is ongoing, with analysis of the artefacts now nearly complete (visit our […]

July 7, 2022

Sully Island stone structure

The Glamorgan-Gwent Archaeological Trust was contacted by Dr Julian Whitewright, Senior Investigator (Maritime) at the RCAHMW, regarding two sites on the foreshore of Sully Island, Sully, Vale of Glamorgan. The remains had been uncovered by environmental and coastal action. Given their fragility, it was considered likely that a level of […]

Our Address

SA12 Business Centre, Seaway Parade

Baglan Energy Park. Port Talbot

SA12 7BR