Cloisters' chambers director Vanessa Peters has resigned after only a year in the post.
The set, rated as a leader in employment, civil liberties and PI/clinical negligence, recruited Peters last July following a management review and the acrimonious departure of former senior clerk Michael Martin.
Peters, who is now taking a month off, says in a prepared statement: "I joined Cloisters to assist the management committee to review administrative systems, to plan for effective marketing of chambers and to restructure the staff team... Cloisters is now well placed to tackle the challenges facing the bar."
A spokesman for Cloisters says: "There will be a chambers meeting in two weeks to discuss things."
The spokesman says that it is likely that someone will be recruited to take responsibility for line management and marketing following a two-year programme of review and restructuring in chambers. "We have been around since the 1950s and in the last two years, we have not just caught up with the more progressive sets but have overtaken the vast majority," he says.
The turbulent year that Cloisters has experienced, including the loss of several tenants, has meant that the set is struggling to maintain its unity.
But the spokesman says: "Far from being in crisis, we've recruited three to the PI/clinical negligence team, Joel Donovan, Yvette Genn and William Latimer-Sayer, in addition to receiving over 100 applications for tenancy, and we consistently receive more applications for pupillage than any other set."
Peters is reportedly taking a month off before deciding on future plans.
The set, unlike many of its rivals, has managed to prevent tenant losses to the new human rights set Matrix.