“Where the court orders a party to pay costs subject to detailed assessment, it will order that party to pay a reasonable sum on account of costs, unless there is good reason not to do so”
“…The budget document in the bundle (“the Revised Budget”) has been revised since the version served and lodged in January 2019, as the earlier version was incorrect in certain respects. C seeks a sum which reflects two thirds of the total of its Revised Budget [10/156] which totals£829,444.43 . This corresponds to a sum of£504,591.96 . This is intended to allow for an appropriate margin of error in the amount that C is likely to recover on assessment (Dent/4/19) [9/125].”