This is what has happened to Elsie. Not checked the replacement yet though.

Oh dear!!!!!! I will need to check Monster now too.

Amazed that this is still a topic after starting this posting, it seemed so simple then to get mine sorted. You may noticed that my profile has changed am I am the owner of a 2010 Octavia elegance estate, will not bore you with details,at least new owner of my Yeti will not have rear foil problems, I note that my Octavia does have foils at the rear. See a massive number of Octavia's but the Yeti is still quite elusive here in Norfolk.

Oh dear!!!!!! I will need to check Monster now too.

Just checked mine now. All looks fine.