I spend spend half my time in a place where it's mainly cash (small town in Germany) combined with FX fees (yes, I could go for another card but there's all that inertia...) means most of my transactions are cash. On the UK side, all but a minor amount of spend is now cash, eg the last 2 taxi rides i took. It's just quicker and easier to do cash than to wait for them to sort out the machine connections.