Time for some back story
Doctor Who was placed into production by ITC who had gained the licence to broadcast to the Midlands for ITV in 1968. The series however was made in London at the ABPC's facilities in Elstree.
Writers for the series included Terry Nation, Gerry Anderson and Dennis Spooner. The concept was one of scale model work and live action combined.
The initial budget for each episode was £25,000 but after Grade saw the first episode of the first series he increased the budget to £38,000.