If we take her testimony at face value (and I admit that may be a big If ) then this was serious assault.
The key point is that tshe alleges she was kicked 3 times.
Now you can argue the pros and cons of the Police needing to use force but the extent of this injury and the number of times she was struck is not an appropriate response to an unarmed protestor.
It sounds from the fact that the police were trying to talk to her at the Hospital in A&E as if they may be concerned themselves that this may be bad for them - they may have video evidence which reflects badly.
Of course it might equally be that she's exagerating it in hope of a compensation settlement
We'll have to see what the complaints commission come up with - they'll get medical reports, testamony and video evidence.
In any case AOG is being disingenuous in trying to characterise Unite against Fascism as far-left.
The difference is that whilst they may have far left members their objectives are not far left - they have no ambition to bring Socialism to the UK - rather to oppose the BNP and other Far Right organisations.
They are Far Right because they have far right objectives
http://www.tandfonline.com/doi/abs/10.1080/00313220601118777?journalCode=rpop20#.Ue1K720pi0Q