I'd like to move this non-load bearing wall over to the right (expanding the 'hallway' width) and extend it out a bit further (while reducing its width). I'm pretty sure it's not load-bearing. It's hollow. The joists above run parallel to it. It does however have two light switches (one either side) and a radiator attached to it. It's unusually wide (141cm). How straightforward a job is this and who would be best to contact? Ta