Doctor Who showrunner brings Viagra story to TV

It was the medical trial that changed the lives of those that took part before it changed the world.

In 1994 a drug called Sildenafil UK-92,480 was given to men in Swansea by pharmaceutical giants Pfizer.

Later known as Viagra, it went on to become one of the most profitable and well-known drugs in history - used by millions of men across the world.

Now Doctor Who showrunner Russell T Davies has produced a drama, called Men Up, about what happened.