The sentence I understand. I don't understand the fine or the compensation. Is that actually payable to Grealish? Grealish is, I assume, a wealthy young man and so not really in need of the cash but how is £100 a sensible number here? If someone tried to sucker punch me while I was doing my job, I would want them to pay me significantly more than £100. I know we don't really do punitive damages in the UK and clearly Grealish was (fortunately) not badly hurt but that is a matter of chance, so either it should be nothing, or a number sufficiently large to hurt/bankrupt the mug. Makes no real sense, unless the point here is that there is no real damage and so no significant restitution needed.