Which force? If it's the Met they'll probably promote you.

I've not been very active long, Been doing weeky fencing for 2-3 months now and a brisk walk/jog for about 3km home from it, its been the last 3 weeks ive been daily for a 2km-3km run

You'll be fine mate, I was 30.5. I'm 6ft 2 and pretty active and Nurse said I was in excellent shape. 

I was worried all Summer thinking if I'm not below 30 I wouldn't get passed fit. I passed and she told me off for worrying over it haha.

Just make sure you keep your fitness up, the 5.4 bleep test level is too low in my opinion. Sounds like you're a fit person anyway.

Medical tomorrow