A BITTER legal battle has broken out between accountants Andersen and household products group Reckitt Benckiser over allegations of unpaid fees of £1.3m. Andersen, which is suing chief executive Bart Becht's Reckitt in the High Court, claims that almost half the debt stems from work it did for Reckitt as part of the group's merger with Dutch counterpart Benckiser in 2000.