I'm really sorry OcUK.
I'm still very cut up about this event, and very disheartened. I know that you've all been trying your hardest, and been very helpful with advice and support etc. But I cannot shake the paranoia of seeing them again. I know that first of all, the chance of seeing them in Harrow is not high, but if it's the place they hang around, then it's not exactly low. Secondly, if I see them, there's a chance that they won't see me. If they see me, there's a chance they won't recognise me. If they recognise me, they might not do anything, they might shout out some abuse or they might actually come up to me.
So being an avid mathematician, I can see the chances of being bothered by the same people are extremely low. Then why can I not shake off this paranoia, 2 days after the event in question?