The re-launched site provides all the functionality that customers are used to - including making, viewing or changing new and existing payments, transferring money between accounts and viewing statements ­- but with a fresher and clearer layout and navigation giving easier access to these functions. Customers can also use online banking to notify the bank that they wish to use their debit card overseas, rename their savings accounts to help identify them and view current offers from the bank.

Sean Gilchrist, Barclays Digital Banking Director said: "Barclays was at the forefront of the online banking revolution when the site was originally launched in 1999 and we continue to pioneer new technology to keep the online banking service as secure and user-friendly as possible.

"With more people using online banking every day it is important that the site looks fresh and the content is relevant. The new design and layout makes it easier to use which ultimately helps customers stay in control of their money. This is the first in a programme of change over the next twelve months which will also see us introducing some new tools and features for customers and implementing a new design for the Barclays.co.uk website."

Barclays now has over three million online banking users with an average of one million people using the website every day.

PINsentry - a two-factor authentication system for online banking - was launched in 2007 and has seen a significant reduction in online fraud losses. Barclays also offers all of its customers free Kaspersky internet security software covering anti-virus software, firewalls, parental controls, spam filters and protection against spyware and adware to protect all of their internet and email activity - not just their online banking with Barclays.

Barclays is the only UK bank to offer a specific .mobi domain site which was revamped earlier this year. The service enables customers to view their account balance and 'at a glance' statements, make transfers between accounts and make payments outside of the bank. In addition, they can find branches and ATMs, get answers to banking questions, view product offers and get support through the online banking helpdesk.

Barclays credit card business, Barclaycard, is soon to launch a significantly improved online account management experience for its customers called mybarclaycard.