The country manor, set within 543 acres of parkland in Welwyn, owed the rise to its ability to lockdown as a high security venue, located 22 miles outside of London.
John Keating, general manager at Brocket Hall, said: "We recognise the importance of offering a trustworthy and discrete approach for this market and its events.
"Brocket Hall is available for exclusive hire and we have found that delegates have really enjoyed and appreciated having the manor to themselves and away from press attention."
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