Thanks for your reply.
In law, the decision about whether 'with intent' is appropriate must always be completely divorced from the consequences of any actions. That means that such factors as making prior threats or deliberately selecting a weapon are more important than the extent of any injuries. (The extent of injuries separates 'common assault' from ABH, and 'ABH' from 'GBH' but it's completely irrelevant in separating 'GBH' from 'GBH with intent').
Here's the relevant piece of advice that the CPS gives to its prosecutors:
http://www.cps.gov.uk...he_person/#P242_19963
They clearly decided that it was worth pursuing a conviction under 'Section 18' but they were ultimately unable to do so. While the jury's decision may seem to be rather perverse, I'm happy to see that at least some jurors are prepared to consider all of the facts. (In my opinion, far too many jurors simply 'go with the flow' and vote the way which will see them get home earliest).
Chris