As Debenham workers continue to stage regular protests over the permanent closure of the chain’s Irish stores, the retailer faces another challenge – this time from landlords. Companies controlled by the $18 billion New York-based investment firm Marathon Asset Management have issued legal proceedings against Debenhams PLC, the retail group’s main British company. While the Irish subsidiary of Debenhams has gone into liquidation, its UK parent is under administration and continues to trade. Bryant Park QIAIF Icav and Kozani Ltd, both represented by Maples and Calder, launched the action in the High Court on Thursday. Bryant Park QIAIF Icav is…