Hi belletower
Once I realised that my ignoring wasn't working, I contacted the police and they had 'a quiet word' with him. That didn't work, so they had a more official chat with him but still no legal action was taken. After that, he carried on but as I was moving away, I though the best thing was just to carry on ignoring. When he turned up in the middle of the night, that's when I contacted the police again and the whole process swung into action.
I may be misremembering but I believe I needed three examples of unwanted contact. These included letters, emails and of course, the showing up at my house. At the time, three examples seemed like a very low bar to warrant police action but I can see now, that if these people get as far as being in touch three times having been warned off by the police, then they're probably not going to stop.
The order that he was given was that he couldn't contact me in any way, indefinitely. The order didn't cover my friends or family but it was made clear to him that if he tried to contact me indirectly, they would take a very dim view...
I was worried about going down this route initially but it's so, so much better than living in fear. Knowing that you've got the force of the law on your side is very empowering.