Someone suggested they went through his rubbish once they were standing out side his house. Seems like a bit of a gamble though as by this point they would have

Someone suggested they went through his rubbish once they were standing out side his house. Seems like a bit of a gamble though as by this point they would have invested quite a bit of time following him etc. And how many people these days (young and living in a shared house in Islington especially) still have a land line, and are even in the phone book?