Canonisation is an idea that exists in a unique way within Doctor Who fandom, in theory, it means an individual can create a body of work that is established on the already existing body of literature that can be drawn upon[1], but it is more commonly thought as what a fan considers what forms part of the Doctor Who universe, or what “really happened”. This is often a personal choice, one which is endlessly discussed and argued about in just about every Doctor Who-related forum or message board that exists on the internet.
we are an alternate universe apart from the overall Doctor Who canon, this is a deliberate move to create separate canon and the copyright of Doctor Who with none of the Doctor Who elements, aside from the doctor and the time machine, our series begins as the 1st Doctor flees her home world of Gallifrey, her travels through time and space are random owing to faulty components in her time-machine.
Doctor Audio Adventures 