I thought her grandfather's wartime stuff was quite interesting: we've had lots of WW1 history on other programmes, but I can only think of the Chris Tarrant one where they spent much of the time looking at an ancestor's WW2 history. I can't remember them covering POW records before.
I've never seen any WW2 service records for any of my family (most were either too young or too old to have seen action), but I was struck by how similar they were to WW1 records. I know not a lot of time had passed, but somehow I thought they might have been updated a bit!
I had no idea the Red Cross had wartime records either. Or were they just there for some background? I can't now remember if they actually produced any records relating to her grandfather, other than his service record, which we'd seen twice before without anyone actually reading to the end.