I blame the butterbeer for my public display of emotion! Do not read on if you plan to visit the Harry Potter Studio Tour as this may spoil some of the surprises. I'm not a Harry Potter obsessive - yes, I've seen all the films and I've watched Daniel Radcliffe, Emma Watson and Rupert Grint graduate from cute kids to accomplished adult actors. And I've wowed at the special effects, supposing most of them to be computer generated images. But I always felt I'd rather missed the Harry Potter boat - with teenage children when the first books were published, I was too old to be trendy. However, a tour of the studio has transformed me into a born again Harry Potter nerd - hell bent on reading all the books whilst simultaneously watching the films, pause button at the ready. It's only on the studio tour that you fully come to appreciate the huge talents of the designers, set builders, artists, craftsmen and women, make up artists - the list goes on and o...