I work on a market stall in London at the weekends. In my experience it's probably higher than that, you get given some really ropey ones but everyone just trea

I work on a market stall in London at the weekends. In my experience it's probably higher than that, you get given some really ropey ones but everyone just treats them normally because there's so many in circulation the banks don't even bother to reject them. I can totally see why they're replacing it.