Finally got around to having a look at mine yesterday. 
 
Checked sunroof drains - ok.
Checked pollen filter inside glovebox - dry.
Checked passenger A pillar trim and found it to be loose at the bottom.
 
Apparently they leak around where the lower leg of the A pillar trim is inserted into the body work.
 
The LR Service bulletin instructs you to cut off this lower leg and glue a patch onto the body to prevent future water ingress. The repair kit DHB500400 contains this patch.
 
Service bulletin here:
 
http://www.lrservice.ru/data/404/LA501-007.pdf