"... so far as practical— ensuring the parties are on an equal footing; saving expense; dealing with the case in ways which are proportionate to [amongst other things]: the amount of money involved; the importance and complexity of the case; the financial position of each party; ensuring that it is dealt with expeditiously and fairly; allotting to it an appropriate share of the court's resources, while taking into account the need to allot resources to other cases; and. enforcing compliance with the rules, practice directions and orders."