So, I have reviewed the rules as written at the start of the season. If Caterham miss the race then the replacement driver was to be Jules Bianchi in the Marussia. Looks like Marussia will be missing the race as well, so neither of their two drivers, assuming they were going to replace Jules, are available to use.
Therefore, as the organiser of the game I am going to use my discretion to change the driver. Considering it needs to be a backmarker that probably leaves either Lotus or Sauber and as Sauber outqualified Lotus in the last race, I am going to change the driver for this race to be Pastor Maldonado.
Feel free to adjust your guesses for this round. Those who have already made a guess I will send a PM to and I will also adjust the opening post.
Cheers
Mark
P.S. My guess is now 35 laps!