HSBC (Hong Kong and Shanghai Bank) the biggest banker in the UK is now saying it is having difficulty with ALL customer accounts. Bank transfers not happening.

http://news.sky.com/story/1543108/payday-problems-hsbc-glitch-delays-payments

We are aware that some customers have not received expected credits today. This issue did not originate from NatWest and we are working closely with other banks to identify where the problem lies. We apologise for any inconvenience and thank you for your patience – NAT WEST official statement a few moments ago


It is not yet known how many business banking customers are affected but they make up a significant proportion of the bank’s 16.1 million UK customers. The number of people relying on payments from HSBC’s business accounts is likely to run into thousands if not millions.
Salaries are not the only payments affected by the IT failure. Businesses that bank with HSBC are finding they are unable to pay their suppliers, with the online banking facilities temporarily closed.

http://www.theguardian.com/money/2015/aug/28/many-hsbc-customers-facing-payday-without-pay