This week is Book Week, an annual event that for children means a celebration of all the great things found in the pages of books, and for parents (mostly, let’s be honest, mums) means the not inconsiderable challenge of coming up with a costume for their child or children for dress-up day.

Will it be Harry or Hermione? A classic Where’s Wally? An old-school Cat in the Hat? Gangsta Granny? The Gruffalo?