I am looking for an App for my Android tablet that will record; g force for braking, acceleration, cornering and also max speed achieved. There are many available but have you any recommendations please, thanks.

I believe Torque can measure g force, along with lots of other stuff? I like the interface and the fact you can set it up how you want it.

Racechrono is good for most car things.
Free to download and only a couple of quid to add in things like OBDII data logging.
Best thing to add on to any setup is a 10hz GPS receiver as the 1hz standard on phones is no good for on the fly measurements.