FAQ.: - Which font did you use? The title is in "Gill Sans MT" and the font of the credits is "SF MoviePoster Pro" (available here, a free version for personal use is on dafont.com). - Can I buy a real poster? It's a little bit difficult. I wasn't sure at first if it is okay to sell the posters or not, because it's usually forbidden to sell fan art (even if a lot of artists do this). But after some requests I put it on RedBubble, where you can buy it. I only get ca. 0,80€/poster, so the biggest part of your money is for printing the poster, not for making me a super rich person ;D
Sorry for the late reply - not only that I was busy during the last weeks, I was also overwhelmed by the flood of comments that followed after I've submitted the posters. xD If you still wan't to share it on tumblr, feel free to do it I've made a post on my own tumblr blog with all 6 posters here, but if you want to put only this poster on tumblr it's okay :3
At the beginning of the episode Sherlock got a letter from a young girl who said her bunny Bluebell (who could glow in the dark) disappeared. Later **KIND OF SPOILER** at Baskerville, Sherlock discovers one of the doctors is the little girl's mum and she took Bluebell away because she gave her daughter the wrong rabbit.