I found the bike safe, against expectations, still hiding in the alleyway in Whitechapel where I left it. The wing mirrors were twisted inwards like the arms of a schoolkid doing an uurrrgggh spazz imitation. I found it by getting as close to the dangerously twisted state I was in when I crashed it and retracing my route...
More observations about last night in a moment... I have some work shit to take care of...