Is a solution to be found in person though? "If the computer is down, it's down" and all that...
Granted, there's zero details given in either article what exactly is happening on the Barclays backend -- hardware / datacenter failure, ransomware, failed data storage / backups. Either way, as the saying goes, "it's a s**t sandwich and everyone has to take a bite..."
My Cynical IT 00000010bits
Regards