This was originally designed by brick enthusiast Andrew Clark and submitted to the LEGO Ideas website, the set successfully gone for production in February.
Before we go for Lego's official images of this set, let's have a look at the video below. This is the submission video by Clark to Lego Ideas.
Here's the official images and product description of 21304 from LEGO.
Construct a stunningly detailed LEGO version of the iconic TARDIS and role-play the Doctor's time-travel adventures! Created by fan-designer Andrew Clark and selected by LEGO Ideas members, this set is based on the BBC's popular and long-running television series about a Time Lord - the Doctor - exploring the universe in a blue police box. Due to trans-dimensional engineering, the TARDIS is bigger on the inside than the outside and this cool multifunctional set includes the console room that houses all the flight controls. Regenerate the Doctor and defeat the evil Daleks and a Weeping Angel with the help of his extraordinary companion Clara. Then close the doors of the TARDIS and launch into another dimension! Includes 4 minifigures with assorted accessory elements: the Eleventh Doctor, the Twelfth Doctor, Clara Oswald and a Weeping Angel, plus 2 Daleks.