This special bulletin examines the context underpinning the regime, the general rules relating to costs, the detail of the new UK rules, and the meaning of 'conduct' within those rules. This is followed by a consideration of the extent to which 'without prejudice' privilege survives in UK ancillary relief proceedings and the practical implications for case management, including the power to seek interim financial provision orders ('costs allowance') to fund proceedings in the new costs climate. The New Ancillary Relief Costs Regime also includes the text of all relevant rules, practice directions, and forms.