>>> could you walk us through how that might happen?
TTT:
I suspect that Dinger2 is remembering that the 2007/2008 banking crisis came about because banks had been lending money to people who would struggle to pay it back and, when times got worse for them, simply defaulted on the loans (probably by applying for bankruptcy), thus leaving the banks without sufficient reserves to cover their losses.
The banks have, of course been lending loads of money during the Covid crisis, and quite a few of those who've taken on personal loans or borrowed money on credit cards may well end up defaulting through bankruptcy, but there are some big differences between 2008 and now:
Firstly, some of the loans (such as Bounce Back loans for businesses) have 100% guarantees from the Government anyway. Secondly, since the 2007/2008 crisis, banks have been required to substantially increase their reserves. Thirdly, since 2007/2008 banks have been required to carry out far more stringent checks on the ability of lenders to repay their loans before lending anything to them. Lastly, even if some banks do find their reserves are insufficient to cover their losses, governments don't like to see High Street banks going bust because of the effects on the economy (and, probably more important to them, the effect on the number of votes that they'll get in the next election). That's why the Government stepped in to save High Street lenders in 2008 and why, no doubt, they'd be forced to do the same again if any bank was struggling to stay afloat.
So I don't share Dinger2's pessimism about the future of UK banks.