I haven't been in banking for a while (I'm on the investment side of finance now) but I have been in finance for 20 years now. I'd say that at least in London,

I haven't been in banking for a while (I'm on the investment side of finance now) but I have been in finance for 20 years now. I'd say that at least in London, my experience is that a majority have degrees which weren't economics/business - sciences and (general) engineering degrees are very common, and maths and comp sci aren't uncommon.