crazyanglaisy - it seems I am not alone in boarding the wrong aircraft !
MrD had one involving his much loved kindle.
Through T5 security and into Galleries North, find seats and settle in. MrD can't find his kindle, he concludes it must have been left at security so dashes back to ask. Agent was very helpful and assisted him but no luck.
By the time MrD had returned I had found the offending article sitting neatly alongside his iPad..... 'but that's the iPad pocket' was his response.
Note to self , never assume something is mislaid until I have checked myself.