No, actually Woolin is to do with the other possible mens rea, Intention not as you say, Recklessness. I think you were meaning the case of R v G which basically made the test for recklessness subjective.
Woolin is the leading case of intention in that, basically, means that one will satisfy the test for intention if (a) it was his intention to perform the actus reus or (b) there was a sufficiently high probability of the actus reus occuring (I cannot remember what language the courts use in the latter, I think it may be "very high" or something.
The example the courts always give is the bomber who intends to blow up a plane for insurance reasons, however the plane, as is known to him, has passengers on board. His intention is not to kill the passengers, but it is extremely likely that they will die (certain you could say), therefore he has sufficient mens rea for murder.
I would recommend reading all the judgments in Woolin.