Haines and Edmonds will effectively launch the company.
The shop reps big names including Davies, Wainwright, Andrew Haigh, Zadie Smith and Ian McEwan.
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Haines reps the likes of Matthew Warchus and Lolita Chakrabarti.
Katie Haines (left) and Judy EdmondsLawrence Watson
Edmonds joined from Lionsgate in 2012 as in-house lawyer and was promoted to director in 2017.
Durbridge said the move is reward for the huge contribution of its new MDs.
