"Banks could face £70bn debt bill"

That sounds like a frighteningly large amount of money.

To put it in perspective, the amount relates to "Leading UK and European banks". Banks are owned/run by, and for the benefit/at the risk of individuals. Seeing as there are about 459 million people in the EU, plus another 10 million in Switzerland and so on, that makes about £150 per individual, or £15 per day for the next ten days, so nothing to lose any sleep over, then.