“14.CPR 44.2 (a) provides that the court, “ will order ” a paying party “ to pay a reasonable sum on account of costs unless there is good reason not to do so”
“that the principles applicable to the assessment of a payment on account are and remain since they were first set out by Jacob J as he then was in the Mars v Teknowledge case. The task of the court is to ensure that it finds the irreducible minimum, which would be recovered”