Hope you can find a solution Culturebloc.
Yeah the mail in London isn't perfect by any means but I find Royal Mail to be far ahead of some companies when it comes to delivering items (and that's saying something)
I used a firm who when sending me out a hot water dispenser.. left the first one just out on the street all day (Someone stole it) Then I finally got one but it was smashed to bits. So when I finally filled the thing with water.. it leaked everywhere. The best one though, was posting me some books where someone had ripped it open and taken everything from inside?.. best bit was.. they still posted me the empty carton through my letterbox!
The trouble I've found is that in London, there seems to be a different postman on our round every week? It's not like the old days where you could get to know these people and sort these little things out! sigh..
(Cue Dvorak's Symphony No. 9, Opus 95), or as it's better known 'The Hovis bread music'