In reply to Mooncat:
I think it's fair to say that all couriers are variable depending on local staff to some extent. Parcelforce, which should typically be fairly reliable, is atrocious around here because of one lazy, incompetent courier who sadly serves my area and can't be bothered to look for[1] my house, so either falsely "cards" or misdelivers entirely (one parcel was never found). Every other person who's had trouble finding it has phoned to ask for directions and the delivery has succeeded, and most seem to find it on their own by looking at a map.
When I've taken them to task for it, it seems they know he is an issue but for some reason the senior management can't or won't do anything about it.
The regular postie (for smaller stuff) is great, though.
[1] It fronts onto a footpath so using sat-nav can bring you out in a few different places, all of which are walkable to it.
Neil
Post edited at 12:36