i can more of less understand how the clocks....

[janzman]

...on my computer and televisions are automatically advanced one hour for BST,but how does my radio controlled bedside alarm clock costing less than £15 do it? I don't understand ,any help please...

[mike11111]

Probably by a radio signal. I thought my mobile would automatically advance but it doesn't.

[grasscarp]

Radio clocks update themselves by receiving continuous time signals from time transmitter stations that send time information over radio waves.

[janzman]

Ok, thanks mike and grasscarp

[RATTER15]

Mike, you probably need to set your phone to do it automatically.

[EDDIE51]

If you had been awake and looking at your alarm at 2am this morning you would have seen the display 'jump ' an hour. You can have radio controlled wall clocks with hands , if you were looking at one of these you would see the hands move forward an hour aa the time changed.
Mobile phones have an 'auto time zone' setting where they automatically adjust to local time, so if you were in an aircraft going into a diffrent time zone the mobile would change to the correct local time as you crossed into aother time zone .