In 1877, the Llay Hall Colliery was opened in the village. Later, the Llay Hall brick works was established next to it to use the clay from the lower coal seams. The colliery was privately owned by the Llay Hall Coal, Iron and Fireclay Company until it was nationalised in 1947. It closed shortly afterwards due to a serious underground explosion. The colliery buildings that are still on the site include the winding and fan house, workshops, a weighbridge house and a chimney.
It is governed by the Gwersyllt Community Council.
- UK Census (2011). "Local Area Report – Sydallt Built-up area sub division (W38000041)". Nomis. Office for National Statistics. Retrieved 20 August 2020.
- "LLAY HALL COLLIERY, SYDALLT, WREXHAM | Coflein". www.coflein.gov.uk. Retrieved 2020-04-13.
- "The Cambrian remembrancer, relating to North Wales | January - 1878 | 1878 | Welsh Journals - The National Library of Wales". journals.library.wales. Retrieved 2020-04-13.
- "Gwersyllt Community Council :: The Council". www.gwersylltcommunitycouncil.co.uk. Retrieved 2020-04-13.
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