Hi cat 1
Well done on having the IVAs accepted. Whether you have to pay over 50% of any increased income will depend upon the exact wording of the IVA proposal and any modifications. This really is a question to directly ask your IP, as they have detailed working knowledge of your file, but I have to say these provisions are almost always put forward these days.
There is no problem with you having a cheque book - where on the forum does it say you can't? And with regard to your current bank, if this is with someone you owe money to, or HSBA or First Direct, you will need to open a new account as soon as possible. If not, then stay with your current bank.
Regards, Melanie Giles, Insolvency Practitioner for over 20 years.
To have me propose an IVA for you, please visit:
http://www.melaniegiles.com/ivaEnquiry.asp
See customer feedback at:
http://www.iva.com/iva_companies/IVA_Advice_Bureau.asp