Ive got a 06 plate and took it in for service and did work on it for free due to leak wasnt aware of coz i only just got the car but Ive compared the space wheel area between both cars, mine has some like white seal you see around the bath and my grandparents nothing? :S , 2 years passed and my grandparents honda shuttle got wrote off and got 56 jazz and the boot fills with water and ive seen where the water is coming from!
lift the boot floor up and remove the plastic grill, there is a join between two peices of metal, its keeps leaking from there, i used duck tape on it and havent check since but the window havent steamed up but ill check tomorrow and report back, might actually help some people!