2007 Mk 7 interior/exterior lighting issues

[duc748r]

Hi all

We fault developed tonight, strange little one!

When I lock the van, as soon as interior light (not one over dash one over head, and rear loading area) go off all exterior lights come on, tried a few different things, ended up sat in the van, and the only way to stop the exterior lights coming on was to have the overhead light (that controls loading area) switched on, and in the end have had to pull bulb from interior light and unplug loading lights making the van think they are still on to be able to lock it without all the exterior lights coming on, strrrrrange!

Any one had anything similar???

Thinking most likely a faulty door switch or something? Although strange it doesn't effect the light above the dash