El S, when on IOT your 'OFAs' (Officer Fitness Assessments) will be scored out of 100 in each of the disciplines: run, pressups and situps, with 100 being the top mark possible. To get 100 in each, you need to do it <8.15 for the run, 87+ pressups and 90+ situps. Sliding scale in each area then works out individual scores and these are matched up to a colour. The lowest score of any will apply to all, so you could do an 8minute 1.5 mile, but score a red in the pressups and you score a red overall.
Red is fail, yellow is bare minimum accepted on course and green is the pass.
Where did you get the 12.11 time you refer to? I ask, because for a man your age the lowest yellow score is something in the 11minute category, not the 12. I scored 9.something minutes consistantly and was still below average for the course.
Also, run outside. You'll improve faster.