The hair was already short, so there was not much that needed to be removed. Scissors seem to have done a sufficient job of providing the necessary exposure of the scar, which really did heal rather beautifully. I don't think that clippers or even a razor will be necessary. Just need a hair grip to keep the remaining longer bits pulled back.
I am pleased to say that the lighting in the second photo was just right for capturing the location where the bone flap was removed - you can see it crossing the scar. When this area is covered in hair, there is a slight unevenness that is just barely visible at my hair line, but if you didn't know it was there, you wouldn't notice. Normally if I turn my head in just the right way when looking in the mirror, there is only just enough deformity to cast a shadow, and I have to look carefully. I'm surprised to see how prominent it is here.
What isn't visible is the shape of the bone flap itself. It is a half circle (you can see it drawn on my head pre-surgery if you scroll down the page), and if move your fingers across that area, you can feel not only the dips in the skull, but little raised bits. The raised bits are the clips holding the bone in place. If you can read Braille, the bumps spell ... nothing, probably. And if you were a Victorian head reader, I don't know what you would find out. I imagine that other areas of my head already provide indications of all manner of Victorian Ladies' Diseases.
Next person to donate 50 quid can, if they choose, have the baggie of hair pictured below. Not very dramatic, I know. It's just a little clump. It isn't like I've shorn a large amount of luscious locks - my hair has been short and ridiculous for several years now, and attempts to grow it longer keep failing. Scissors are always too near.
I've also just noticed that the baggie has bits of soap or something sticky inside it, for I am thrifty and used a bag from the toiletry case I use when traveling. I cannot entirely rule out the possibility that the hair itself is icky and sticky. You may not want this pathetic clump.
Or! The other option that has just occurred to me is as follows. The next person to donate 50 quid gets an object d'art containing this hair. Perhaps a little fluorescent salt-dough skull with this filamentous biomaterial protruding from the top. Or maybe a piece of scrap paper with glitter and stickers and popsicle sticks and hair smeared across it in glue, the kind of thing a small child might make in kindergarten, a depiction of some inexplicable view of the cosmos through the lens of cartoon fantasies and The Neverending Story. Eh? Or not.