Come Trick or Treating at the British Museum Tickets are available for Friday 28th October at 6pm http://scavengerhunts.london/halloween-after-work.html Saturday 29 October at 2pm http://scavengerhunts.london/trick-or-treat.html Sunday 30 October at 2pm http://scavengerhunts.london/halloween-sunday-hunt.html   NB This event is not organised by the British Museum.