A UK bankruptcy judge ruled on Wednesday that Barclays Capital must comply with requests for information about its whirlwind acquisition of Lehman Brothers last September from Lehman’s creditors, who claim that BarCap enjoyed a windfall of more than $2bn in the deal. The ruling is a victory for Alvarez and Marsal, the firm hired by Lehman’s creditors to locate and reclaim as much of the Lehman estate’s assets as possible.