As Melanie has stated, you do need to ask your IP's permission before applying. I, like others often worry about their cars during the life of the IVA, mine has seen better days to say the least. Trying to get finance is not impossible, but the rates and costs per month will make you think again.
I have been given permission to seek a company to grant me a loan for a car. I have been offered/approved for one through carfinance247 but for £215 as the cheapest deal... which for me isn't worth considering for a very small loan, but I guess we all have to weigh up what is the best all round.
I don't know whether anyone else has had any success with other companies, but I would say the majority will be spouting at least 22% interest on the loan - quite eye-watering considering, but that comes with being in an IVA
So for me I think I will just carry on with my rust bucket for now and any repairs/maintenance will have to be dealt with there and then!