Lighting problem

Have just come back from our last outing of this year in our 2007 abbey gts 418 and experienced a problem with the rear roof lights going off and wouldn't come on again, it's the spot lights over the bed the toilet light, rear roof light and also the strip light over the kitchen, have checked the fuse and it's ok even pressed the reset on the mains trip but with no joy, the front lights work fine anyone got any ideas of what it could be 

cheers