I haven't gone quite as far as that, but I agree with the principle. As much as reasonably possible, I keep facilities like personal banking, personal credit c

I haven't gone quite as far as that, but I agree with the principle. As much as reasonably possible, I keep facilities like personal banking, personal credit cards (always at least two), any mortgage or other secured loan, and any business financial services with different organisations that aren't part of the same group. There's often small print in bank terms and conditions about being allowed to grab money from anything of yours they have access to if there is a problem with anything else, and frankly I don't trust them not to abuse that, particularly if they've already made a mistake that caused a serious problem in the first place. Also, the FSCS compensation limits tend to be per person per firm, so dividing assets can sometimes increase the amount covered if anything really bad happens to the financial firms. And yes, I do also have some emergency cash hidden in safe places. I don't get crazy paranoid about it, but it's a substantial amount, certainly enough to fill my tank and buy essential provisions for a while. I would be concerned about becoming a truly cashless society as well, for this among other reasons.