Limbo

Limbo was like a white Void.

The Trickster had sent Sarah Jane Smith to Limbo when she was removed from time. Maria Jackson was also sent here. (SJA: Whatever Happened to Sarah Jane?)

The Trickster and his Graske had access to Limbo, and could materialize and dematerialize in and out at will. (SJA: Whatever Happened to Sarah Jane?)