http://www.opsi.gov.uk/acts/acts1989/uk ... -pb5-l1g91
This copy and paste is from the children act. I added 15 to 17, so you can read about the effect that an application might have......
(14) On disposing of any application for an order under this Act, the court may (whether or not it makes any other order in response to the application) order that no application for an order under this Act of any specified kind may be made with respect to the child concerned by any person named in the order without leave of the court.
(15) Where an application (“the previous application”) has been made for—
(a) the discharge of a care order;
(b) the discharge of a supervision order;
(c) the discharge of an education supervision order;
(d) the substitution of a supervision order for a care order; or
(e) a child assessment order,
no further application of a kind mentioned in paragraphs (a) to (e) may be made with respect to the child concerned, without leave of the court, unless the period between the disposal of the previous application and the making of the further application exceeds six months.
(16) Subsection (15) does not apply to applications made in relation to interim orders.
(17) Where—
(a) a person has made an application for an order under section 34;
(b) the application has been refused; and
(c) a period of less than six months has elapsed since the refusal,
that person may not make a further application for such an order with respect to the same child, unless he has obtained the leave of the court.