These come entirely unsubstantiated and should be taken with an enormous pinch of salt. However, all three were told to me by at least semi-plausible sources.
2. Michael "Joseph" Portillo and Diane "Mary" Abbott. I hadn't realised how far back they went, but the former This Week duo were contemporaries at the paired Harrow County Boys and Girls schools, and both were keen on drama. The rumour I heard was that they did a nativity play together, playing the central couple. This is the one I'm most sceptical about.
3. Who's your favourite Miliband? At a Labour conference a few years ago, badges were available for people to go public with their Miliband preferences. I'm advised that Ed turned up and claimed a David badge, then David turned up and claimed a David badge too.
Please feel free to disprove (or prove) any of these for me.