Landmarks & buildings
Friern Hospital
Former psychiatric hospital in Colney Hatch
Wikipedia names Friern Hospital as where 1 film or series was filmed; its page links to the sentence that says so. Wikidata records no shoot here yet.

Filmed here, per Wikipedia
Wikipedia says these were filmed in Friern Hospital. Each title’s page links to the sentence that says so.
Filming locations nearby
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Towns & cities New Southgate
England · under 1 km
A residential suburb of North London
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Towns & cities
London Borough of Barnet
England · 1 km north
Borough in the London Region in England
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Towns & cities
North Finchley
England · 2 km west
Suburb of London in the London Borough of Barnet
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Towns & cities
Bounds Green
England · 2 km south-east
Area of north London in the London Borough of Haringey
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Landmarks & buildings
Ashmole Academy
England · 2 km north
School in Barnet, UK
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Towns & cities
Southgate
England · 2 km north-east
Suburban area of north London, England