Thames Trot pre recce

I'm up on 27th Dec 13 at 6:30. The plan is to get a train from Reading to Oxford then run back to Reading.  The is one Red flood warning and lots of Amber so my feet are going to be wet all day. The plan is to take my time and get to know the course ready for the big day, 1st Feb 2014, Thames Trot 50 miler.  I'm a little bit scared of getting lost but with the route on my Garmin and a map I should be fine. I'll report back later.