It was Harry Potter’s fault that I almost missed the 08:30 service from Edinburgh Waverley to London Kings Cross. We hadn’t appreciated just how long it would take to organise refunds on the 40 cinema tickets for Harry Potter and the deathly hallows part 2 for the children who now could not make it. Nor had we realised that our purchase of so many tickets in the first place would be so fascinating for the box office staff.