Had 2 interviews - both looked at logbook, licence,medical and mcc certificate. Photocopies taken off everything, including various pages of the logbook.
One of my interviewers went through my entire logbook with me, every page, basically to get a complete story of my fying to date, from where id done my ppl, right through to IR pass etc.
Keep your logbook neat and up to date. Dont be scared to write some 'interesting' notes in the remarks section of each flight. Even something amusing that happened on the flight. It will give you something to speak about and something to look back on in years to come.
Some other handy things to take to interview - ATPL pass certificates, CP and IR pass certificates, and ID(passport). Oh and always take a PEN!!!!!!!!!!!!