I closed two business accounts with other banks,and opened with amex and given £10000 credit limit and £6000 on other card, I spent £4000 for my business, after few months they taken of all my credit limit and left me only £100 available, not a phone call or explanation,and it happened when I was out shopping and my card was declined,they did the same thing to my personal card,never trust them again,why given that credit limit in the first place.