I agree with all the above, I always have a scanned copy of Passport and travel docs accessible on my phone along with boarding passes etc.
Another idea, because i normally keep my phone on me at all times. I sort by next of kin contacts under I.C.E.
The International emergency response teams have a standard procedure, they should look for a contacts in your phone under the listing of I.C.E ( In Case of Emergency).
I also log on to the our F.C.O (Foreign and Common wealth) website and state which countries I am travelling to and the time frames I am travelling,(if outside Europe) then at least the Embassy or Consulate with in the region knows roughly how many UK citizens are in the area. Again one lists point of contact etc with them.
Now for a nicer subject.......