Water in boot?!

[glendog74]

A bit of a random one this...

My car is normally kept in the garage all nice and dry. However, this week it had to live outside in the manky wet weather we had down here in Cornwall.

On looking inside the boot yesterday i found that there was a considerable pooling of water in the left hand plastic storage panel (the one with the warning triangle & first aid kit) and the left sidewall carpet was wet with water seeping into the underfloor storage well...

Anyone else had this issue or have a clue how it is getting in?

I tried an internet search but they mainly talk of wet footwells within the cabin due to sunroof issues. No doubt BMW wont give a fook and wont do it under warranty either as it is bound to be 'trim' item at fault...