Well that would make for a very illuminating court case.
I have no doubt the case would claim provocation, 'being a terf' and 'actual violence' and argue this is justified for four people smashing a woman in the face and gripping her throat while trying to steal and in the end smashing her camera.
Since the tweets and facebook screen shots undeniably prove this was intent to be violent, and celebrating the violence afterwards, in the context of people who wear t shirts with pictures of blood stains and the words 'punch a terf' (and worse) and see no problem with this....
....a judge isn't going to have a tricky time applying British law.