non starting electriacal problem

Please can any one help, i have a problem with the number plate lights staying on [but i removed the bulbs]

 i have booked it in to an auto electricain tomorrow, but this afternoon while i was trying to change the passenger door central locking, the stereo switched off,it will switch on ,

But the car wont start!The dashboard board lights come on but there is just a click and the engine wont turn over.

Has any one any i dea, i have plaecd the battery on charge[ but it has never been an issue , & started the car twice today]

I would appreicate any help asap

thanks

jon