call 0345 301 0101 minicom number 0800 027 1396 online service home online banking using online banking one account insurance services and charges complaints procedure customer tax operations cto security welcome to the one accountonline service existing customers can access their online account 24x7 set up standing orders make transfers between accounts as well as providing flexibility with their finances . if you wish to discuss your account with one of our customer service team you can contact us on 0345 301 01 01 minicom 0800 027 1396 . we re here 8am 8pm monday to friday and 9am 5pm saturday . the one account is a secured personal bank account with the royal bank of scotland plc. if you would like to discuss alternative mortgage options through either the natwest or rbs brands please call us on natwest 0800 096 9527 minicom 0800 917 0526 rbs 0800 056 0567 minicom 0800 056 6587 . this account is not available to new customers . online banking access your account and manage all your banking needs with our unique online banking service . online banking online banking help download our free security software