I have had the wiring on the stereo redone as I had a problem with the power going to the ignition and this done by Huets in Worthing, who also done my alarm&immoboliser so I would like to think that its nowt to do with those.
I have checked any interior lights and they all go off.
As for the ammount of time, it went dead pretty much overnight.
Got a mate on way round tonight to plug it all up and take some readings so he will hopefully find the problem.
I am now travelling to work, in a FIAT cinquicento which is in a word Shite!! Need her back on the road asap!!!