How to Display Lumia Status Bar Signal Information?

The Nokia Lumia 800 smartphone runs the Windows 7.5 Mango operating system.

One feature that I have found is that the status bar shows when the phone is locked displaying information such as mobile network signal strength, battery life, WiFi connectio & time.

However once the phone is unlocked this information is no longer shown by default on the home screen status bar. There appears to be no way to alter this to permanently display the details but if you need to view the information it is possible to tap the status bar area at the top of the Lumia 800 screen and the signal strength and network type will be shown.