Post 2004 Student Loans can be included in your IVA, but they will very likely reject. So if they are owed more than 25% of the total debts, then this will serve to fail the arrangement.
If you have similar circumstances, they can be left out, however this must be fully disclosed to the other creditors and if your income increases above the repayment threshold then you will be liabile to start making repayment which will affect the level of your regular contributions.
Regards, Melanie Giles, Insolvency Practitioner for over 20 years.
For further details contact me at
http://www.melaniegiles.com and view my IVA blog at:
http://melaniegiles.blogs.iva.co.uk