After a day of heavy rain I usually have to scoop out a pint or so of water from the spare wheel well - rather tiresome. However, after reading this and other threads on this issue I'm still a bit confused.
Much has been written about the vents located behind the rear bumper, below the tail lights. I remember one post (which I can't find right now) where the poster had solved the leak bi simply applying sealant where the "roof" or cover above the vents joins the bodywork (see item #22 here: https://skoda.7zap.com/en/cz/fabia/fab/2010-608/8/819-819030/#16 ). According to the post, this could be done through the hole behind the tail light without removing the bumper.
Decided to try this, but couldn't find that cover or anything resembling the vents. Were they abandoned on the 2014 estate? Or moved, so that one has to remove the bumber to find them? From the pic here: http://imageshack.com/a/img633/8754/3Tl56V.jpg they definitely seem to be accessible through the hole?
For now, as an experiment, I've cut out a piece of rubber mat, covering the hole for the tail light cluster securing bolt, kept in place by the bolt's own gasket. More rain tomorrow, so will see if that helps (probably not).
Thankful for more input on this. Will have to decide between letting my garage fix it (removing the bumber standing on the drive, looking out for more rain and worrying about sensor wiring not attractive) or simply drill a hole (Ø 5 m/m?) in the lowest part of the well.