I have substantial equity in my own home and a small mortgage (the repayments are 1/7th my monthly salary!), own an apartment in germany outright, have a 10k credit card with nothing on it, have no judgements against me or anything like that and no other loans/debts and guess what, declined interest free credit for a miserable 5 grand at B&Q. The B&Q lady said "happens all the time and people don't know why and just sit there stunned". B&Q don't handle the credit directly, it's done by a finance house. I'm guessing I'm in a similar boat-not registered at all with ICB or whoever.