BBC series Survivor is reportedly in jeopardy after its first series attracted just 2.6 million average viewers. The reality show, which aired last year in a prime-time Saturday night slot, reportedly cost the broadcaster £30million to produce. The show pitted 18 contestants against each other as they were split into two tribes on a Caribbean island. The groups faced a range of physical and psychological challenges, with host Joel Dommett fronting the reality show. It was previously reported to be an “absolute disaster” for the BBC, with a source at the time telling the Daily Mail: “It is terr…