252. Interim order of court
(1) In the circumstances specified below, the court may in the case of a debtor (being an individual) make an interim order under this section.
(2) An interim order has the effect that, during the period for which it is in force;
(a) no bankruptcy petition relating to the debtor may be presented or proceeded with, and
(b) no other proceedings, and no execution or other legal process, may be commenced or continued against the debtor or his property except with the leave of the court.
So once your IVA is approved the creditors can't do anything.
If you are rejected, I presume they just go ahead with the original application.
Sharing from experiences of dealing with debt
The greatness of a man is not in how much wealth he acquires, but in his integrity and his ability to affect those around him positively.
Bob Marley. http://kallis3.blogs.iva.co.uk