"…to enable the court to deal with every children case: a) justly, expeditiously, fairly and with the minimum of delay; b) in ws which ensure, so far as is practicable, that i)the parties are on an equal footing; ii) the welfare of the children involved is safeguarded; and iii) distress to all parties is minimised; c) so far as is practicable, in ways which are proportionate i) to the gravity and complexity of the issues; and ii) to the nature and extent of the intervention proposed in the private and family life of the children and adults involved"