In order to practice:
Select a Spitfire.
Look down on the left side of the cockpit.
There you should see one instrument with three needles (one left, one right and one on top).
This shows the brake pressure available of the system (upper) and the brake pressure applied on the left (left needle) and right (righ needle) wheel.
Press the Brake key and you will see the left and right needle moving upwards (braking).
Release the Brake key.
Now first turn Rudder or turn ailerons left (or right), keep it there and press the Brake key.
You should see only one needle, the left (or right) moving. This shows you which wheel is braking.
Very nice system, easy to see
It is a long time since I flew a Huricane but I think it has exactly the sam gauges at the same place as well.
Hope it helps.
~S~