Jeremy is correct.
The Snaresbrook Crown court is in a large and rambling building originally
built as a home (asylym) for orphans and designed by Sir Gilbert Scott.
The building was opened in 1843 by Leopold, King of the Belgians. Just
before WW2 the building became The Royal Wanstead School which I remember.
The school ran into financial difficulties and closed in 1971. The
premises were then acquired by the court service. There are over 20 courts
there with all the back-up offices, Judges rooms etc.