You will be expected to supply your IP with payslips and an up to date P60 every year. Some do ask for them every six months. You may be asked to supply receipts for some expenditure i.e. petrol.
Some IP's ask for bank statements as well.
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