Ah yes. I'm a Brit. The Beeb struggles to find the cash to make USian length series ... after all the largest, richest, market is the USA and the average USian is not known for a willingness to devote more than 5% of their attention to a TV programme, which means that cerebral programming in a foreign language (Britlish) is not exactly marketable. If -- big IF -- In The Flesh garners enough audience appreciation I am sure that, like Being Human, it will return to develop the themes sketched out in the (mini) series scene-setter.
In the Flesh (like Being Human) differs from USian SF/Fantasy offerings in that deals with gritty real-world characterisations and -- moreover -- departs from the USian TV standard in that it is unafraid to reveal, up front, some details which give a level of back-story/believability to the basic premise of the story.