155mph

What is FB?

Word of caution - if you have held your license for less than a year you might find some dealer's politely declining your request for a test ride. At your age, insurance is a big consideration.

Take some time and things will seem better in the morning. Your experience is not atypical. I passed my MOD2 yesterday. Examiner wasn't looking to find fault - just that you can ride safely and competently. Radio check should have been done at the start of the test. Don't let what you observe on the road influence how you ride on the day. Remember, you ride to pass the test. Easy to pass, easy to fail. After that, just stay safe. Did the examiner invite the instructor into the room for the post ride debrief? You should talk it through with your instructor. Possibly some unscrupulous instructors out there but they don't survive very long, generally they make a living by getting you through your test. My advise is take a few days out and then book yourself in straight away for a resit - best of all, you now know what to expect which is a heck of a lot more than I had.

What position would you deem as the safest position in normal riding? So which is best for test?

No right or wrong answer I'm afraid. Generally, yes take the principle position on the road, but if there are parked vehicles, then you may want to be more to the right. If the road bends to the right, then you want to be closer to the left. Best to avoid obstacles like potholes and speed cushions, but mirror check before changing direction (before and after) - but again, within the context of what is around you.

This might

Nice review.