Hello, my first post. I am the flat-mate.
I believe you may require a couple of paragraphs for your FAQ's. I'm part-qualified as ACCA and have more years experience in accounting than I care to consider, but here goes.
Everything has generally all been mentioned but to summarise:
"If you have claimed as deductible expenses against self-employed income any bank charges which are subsequently refunded, those refunds must be declared on the tax return pertaining to the period in which the refund was made.
This can be done by reducing the bank charges paid in the same period of the refund. If this results in a negative figure it can be entered as a negative cost or as other trading income received.
This will have the unfortunate effect of increasing your taxable profits (or decreasing your trading losses); and although you may not wish to do this, you are in fact required to do so by law.
If HM Revenue and Customs were to discover an omission of such a declaration, they will re-assess your tax liability and may impose fines, penalties and / or interest.
Note that any receipts from the bank in excess of that which you had claimed as a tax deductible expense will be treated separately as a personal receipt. How this excess is treated will depend on your personal tax situation.
It would be my recommendation that you seek the professional advice of a qualified accountant if you are in receipt of such refunds and are in any way unsure of how to treat them on your tax return."
Good luck to you all.