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(not sure what the building is/was or what it's called?)
I always think of it as The Brighton Business Centre:-
"... built in 1854 as the Diocesan Training College for Schoolmistresses".
https://www.mybrightonandhove.org.uk/category/places/placeshop/brighton-business-centre
Nowadays it seems to be called Citibase Brighton
I went in there a 2 or 3 years ago, BC, to see a friend who worked for a business that was based in there. Rows and rows of glass-walled (and roofed?) cubicles, each housing a separate business. Odd place.
The spire of St Luke's Prestonville on the horizon with Shaftesbury Court(not sure what the building is/was or what it's called?) on Ditchling Road in the foreground.