I am actually crying with relief (a little-not sobbing) that I've found my idiot/darling husband's passport after around 6 hours of searching! I wanted to tell you all that I found it stuck vertically between the side of the mattress and the bed frame. It must have been swept off the bedside table in the night and lodged there. I actually searched Mumsnet a few hours ago to see if anyone had any advice and so now I'm posting this in the off change it helps someone! Maybe others have found things in unlikely places? My favourite from when the children were tiny was looking in the seat of any ride on toys- often car keys and remotes were in there!