SW1
Mate sorry to hear that you did not pass the flight grading! Try and see if you can get a second shot at it, their is no harm in asking and try and go for the long course if they say no then at least you tried...
You say you have'nt flown an SEP for over a year? Can I ask if you've been flying recently on which a/c... and did you do the first four flights in the Grob what sort of stuff did you have to do and do they give you enough time to prepare or is it rushed??
I hope it works out for you!
FTP