Many of Lehman Brothers’ futures customers have been left stranded, unable to transfer fully their positions at LCH.Clearnet following an apparent dispute between the Financial Services Authority and PwC, according to people familiar with the situation.

LCH.Clearnet yesterday declared it had begun the orderly transfer of client positions, a process that would allow Lehman's customers with segregated futures accounts to transfer their positions to other qualifying clearing members willing to take on their business.