where post please?

I've lived in B29 for 8 years, but I still wasn't sure I was using the nearest postbox ... until I came across a handy site that maps them all - from a nice man affiliated with the lovely mysociety.org bunnies. thanks!

Wonder if mysociety can fix the bizarre practice of the postie having to bring large things round to your house without being able to check first that someone's in ...