Tony almost right. I had a VPN problem on my Smartphone which would not allow connection to a particular App.
However I have solved the problem. I remembered I had installed a program tht aimed to show your computer was active - Auto Mouse Mover. I stopped the program and now banking works.
The program by MurGee.com is malware in that it does not show in the installed programs either in control panel or in programs. It does not appear in any of the Program Files folders. Its only presence was in the Download folder and in the registry. I opened the program, switched off the start option, rebooted and cleaned the registry.