The single-partner branch was retained by the City firm after its Paris practice joined with French best friend Bredin Prat in 2006.
Paris partner Andrew McClean will return to London to join the City finance practice, reports legal website RollonFriday.
Slaughters executive partner Graham White said: “The fact that we’re now moving Andrew and his trainee back to London is a reflection of how busy our finance lawyers are in London, how quickly Bredin Prat has developed its financing capability, and how well the arrangement with Bredin Prat is working.”
Former Slaughters senior partner Tim Clark slashed the firm’s international reach between 2001 and 2007 in a bid to focus its referral relationships
The New York and Singapore offices were both closed down in 2004, with the Singapore practice transferring to Australian best friend Allens Arthur Robinson.
In 2006, the six-partner French office followed suit. Four of the partners joined Bredin Prat, while Pierre-Pascal Bruneau went to Debevoise & Plimpton and Antoine-Audoin Maggiar went to Berwin Leighton Paisner.
McClean was sent out to manage the Bredin Pratt relationship.
Slaughters now has just one significant overseas office, its 11-partner branch in Hong Kong.