Great explore this and has been on the list for quite some time now, only being an hour or so away. Unfortunately we did not manage to enter the hospital section as it is now half demolished and appeared to have a somewhat eagle eyed secca watching over it and the rumers I had heard of the aircraft hangars recently being vacated are not confirmed as we could not find an access point.
History shamelessly stolen from another report found on google…
The North Wales Lunatic Asylum was the first psychiatric institution built in Wales; construction began in 1844 and completed in 1848 in the town of Denbigh. The U-shaped Tudorbethain style hospital was built due to the spreading word of mistreatment of Welsh people in English asylums; The North Wales Hospital would be a haven for welsh speaking residents to seek treatment without prejudice or a language barrier.
The large mansion on site, Great Barr Hall, had its beginnings in the 17th Century, but was remodelled both by Joseph Scott in 1777, and in the 19th century by various occupants.
The Lunar Society, an infomal group of leading engineers, industrialists, scientists and thinkers of the day met here in the early 1800s. the hospital colony for those with severe learning difficulties was opened after the first world war. Originally known as Great Barr Park Colony for the mentally defective, it was later re-named St Margarets Hospital.