Client set up a limited company a couple of years ago and used his personal credit card to help fund the business. He feels the interest charged on the credit card was only incurred because he was helping to fund his business and so he should be able to claim it. I have explained that unless the expenditure on the card was solely incurred on his business and there was no personal spending then he can't claim the interest was wholly, exclusively and necessarily for the business. I would think for a sole trader you could probably apportion but I don't think you can with a Limited Company.
If my view is correct is there any chapter and verse in this area that I can refer him to.