Crikey.
I had mine renewed a couple of weeks ago.
No blood taken, and the step test was 3 minutes (I think) on one of those step thingys you have in a gym, which was much better than the 18" box I had to do one year, as well as the first year I had it done. That is the third time (out of 5 medicals) I have had the little step, A friend of mine had to do 130 steps on the big box.
I did have to have an ECG though, but I gather not everyone does.