What was the original purpose of the site, used now as a studio, where a hologram of Paul Harris is a permanent feature ?
Paul Harris (choreographer):  An interactive hologram of Harris is a permanent feature of the Warner Bros. Warner Bros. Studios, Leavesden:  Formerly known as Leavesden Film Studios and still colloquially known Leavesden Studios or simply Leavesden, it is a film and media complex owned by Warner Bros. The studios and backlot were all retrofitted as the site's original purpose was as an aircraft factory and airfield called Leavesden Aerodrome, a centre of British aircraft production during World War II.
aircraft factory and airfield