TDX Group, a UK debt collection advisor, has sold a 40 percent stake to Bahrain-based investment group Investcorp for £28 million ($42 million). Working with creditors, purchasers and collection agencies, TDX provides data including sale market pricing, bid data, segment and account level performance profiles and collection agency performance. At the end of July, TDX estimated that £9 billion was set to flow into debt solutions during 2008. Hazem Ben-Gacem, a London-based managing director of Investcorp, said his firm expected £37 billion of unsecured delinquent debt to be outstanding in the UK, as well as £4.5 billion of credit card debts and £10.5 billion of unsecured personal loans in default. Investcorp's other European technology investments include Moneybookers, a £70.6 million secondary buyout in early 2007; Sophos, a UK anti-virus software business; and Germany's circuit board business Mania Technologie. In November, it bought Italian vending machine manufacturer N&W Global Vending for €800 million.