101 is in use, in certain areas at least - I phoned it earlier in fact for the first time! There was a man staggering about and falling over (extremely drunk!) heading towards a very busy area of the city with busy main roads, a major bus terminal and tram lines in the dark round rush hour. I worried he was a danger to himself and others so called 101 and was put through to the local police. As I was talking to the operator he started off again towards a very busy traffic area so I followed at a distance - must have sounded quite comical in some ways to the operator (he's down, he's up and off again...he's down again...etc...) and ended up pulling him out the way of some oncoming buses as he fell back into the road (lucky I was behind him keeping an eye!). He then fell over again (into a group of people) and I managed to keep him there before some very nice policemen arrived.
I felt a little bad bothering them with it but I was a lone female and he was a lot bigger than me and paralytic and a danger to himself and others. They were lovely though and said I did the right thing. Not one other person (packed as city rush hour) even stopped to ask if I needed any help or if everything was ok (obvious it wasn't though).