Sherlocked is the official Sherlock convention. It's hosted by Massive Events and is based around th BBC TV series with Benedict Cumberbatch.
There was A LOT of controversy surrounding this event. As they had sold tickets based on Benedict's appearance at the event, despite the fact he wasn't going to appear and nor had he signed an agreement to say he was. When this became apparent, Showmasters changed the event to the same price, but meeting his parents. The cost of this was £3000.
So what happened? well, with increasing resentment coming from social media regarding his appearance, Benedict was shamed out of coming off his holiday with his wife and child, to attend this event. You heard that correctly, a convention organiser shamed Benedict Cumberbatch off his family holiday. What does this mean for future Sherlocked events? well, that remains to be seen.