One of London's more macabre museums is opening late for Halloween. In case sitting among pickled tumours and dissected brains isn't spooky enough for you, there are also talks on hangings and the tendency for ancient bodies to 'rise' from the dead. They even suggest you bring your own jar (with lid!) for a ‘pickle a part’ workshop. Brrrr. Just as well there'll be a pay bar so you can get some dutch courage.