Outage maps on the site show most of the UK affected by problems for each. The outage comes in Black Friday, one of the biggest days of consumer spending in the world (where people will probably are likely to want to move their money around). Of course, customers from both NatWest and RBS have taken to Twitter to express their frustration. One said: “Black Friday and NatWest online banking down.” Another wrote: “NatWest why are your services down? I cannot transfer or send money on the app? On Black Friday as well coooomee on.” A third declared: “NatWest another day another instance of bankline going down. This seems to be happening far too often recently. “We have a number of property completions happening today so I’d appreciate some feedback as to when it’s going to be back online.” Responding to customer complaints on Twitter, NatWest said it’s currently “looking into reports of issues with some of our services”. At the time of writing, NatWest’s service status page says all its services are working normally. It’s currently unknown what has caused the outages for both NatWest and RBS (both subsidies of The Royal Bank of Scotland Group plc) on Black Friday. Express.co.uk will be updating this page with the latest service status for both NatWest and RBS.