I have a 2005 Discovery 3 HSE 2.7 Diesel which has been well looked after and never been off-road. Today I noticed that all of the tailgate glass had shattered with many of the edges and corners disintegrating into small pieces. The car was not used all day, is parked well away from passing traffic and there are no signs of any rifle or other external damage. The surrounding body work is unmarked. The car was parked in Kent in temperature of 12 to 14 Centigrade. Has anyone else experienced this?