NavList:

Murray Peake you wrote:  If my identification is correct, there seems to have been a second asylum 2.25nm further north, which had me puzzled

Murray
For most of the 18^th and 19^th centuries the UK had quite an asylum industry.  It didn’t take much effort to have someone incarcerated for years.  Then by 1985 modern drugs were making 24/7 care unnecessary while care costs to the NHS were becoming unsustainable, so the UK went over to ‘care in the community’.  Generally, this was seen as good practice, but recently increasing costs have led to cutbacks at a time when increasing recreational drug dabbling, social media bullying, and gender worries have meant that demand for care has been increasing, especially amongst the young or the social misfits.  These days, apart from the criminally insane, it’s becoming very difficult to get inpatient care, much to the consternation of parents affected and sometimes with tragic results. 

Post 1985 most of the old-style asylums closed quickly.   Then they were allowed to fall into decay until many of the more useable ones were bought up at ‘fire sale’ prices for the land or for development into hotels, flats, company HQs etc. 

I think you’re talking about ‘The Lawn’ https://en.wikipedia.org/wiki/The_Lawn,_Lincoln , which had quite a reputation for revolutionary new practices in the 19^th century.  There was even a third asylum about 3 miles south https://houseandheritage.org/2018/08/17/harmston-hall/ ,  and it was occasionally whispered, somewhat frivolously, that Waddington was the only Bomber Station with an asylum at each end of the main runway.  Not to be outdone, RAF Cranwell a further 12 miles south didn’t miss out https://www.countyasylums.co.uk/rauceby-sleaford/.  The ‘History Pulldown’ of this last site also explains how the UK came to have so many asylums.   All we have now are these sub-sections of our main hospitals https://www.lpft.nhs.uk/our-services/adults/acute-inpatient-wards .  The narrative gives you the current ‘drift’.  DaveP