Catching up with your old mate from school can be great, or an absolute nightmare. As soon as you see the advert your mind will go into overdrive. Will he be there? Will she be there? A lot of the mystery of how our old schoolmates looks has been taken away thanks to the likes of Facebook and Friends Reunited, but there will still be some elusive ones that that haven’t created accounts, or haven’t added a photo! One thing to avoid at all costs is to greet someone with their old nicknames; this is a definite no-go area unless...