The 'ones under where the reversing light is' are rear side lights and rear fog lights. If the bulb is ok on the rear door lamp then check wiring where it enters door at hinge for breaks. Your first post did say no brake lights at all hence the switch suggestion.
 
Thank you so much for your help I feel like a proper twit my one son said I have now brake lights at all hence the original message another son said you only have the ones in the bumper at the bottom hence I was panicking a little only to find what I thought is brake lights are rear fog lights Pmsl so sorry about that but u have been a great help thank you so much
 

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