IP's have always differed slightly in what they want, but Crefitfix like the following:
-6/12 months bank statements
-Payslips
-Current income and expenditure form, including proof of any changes such as an increase/decrease
-P60 if you've had one at this point
Started IVA 27th Feb 2012 - Due to complete 27th Jan 2018 !!
Full & Final submitted and accepted 30th March 2015, paid 10th April 2015 - 3 yrs 1 month into IVA
Completion Certificate received- 30th April 2015!!