|Place of work||Throughout Pontypandy|
|Family||Malcolm Williams (brother)|
Mike Flood (husband)
Mandy Flood (daughter)
- Hair: Black
- Eyes: Brown
- Friends: Everybody in Pontypandy
- First Appearance: Twist of Fate
She drives a small ambulance to check on her patients and occasionally comes to the fire station to train the firefighters in first aid and equipment.
She also has a 4X4 Mountain Rescue Ambulance.
She and her family live in a house on the outskirts of Pontypandy.
She has a brother named Malcolm Williams, who is a police officer.
- It was stated in the episode A Real Live Wire that she was allergic to fur, however in Twist of Fate she did not react when she was near Dusty and when she was near Radar and Nipper in the CGI episodes Sheepdog Trials and Seeing Red.
- Helen and Mike have been married for over fifteen years.
- She was most likely raised in Jamaica as stated by Mandy that Helen went to the Jamaican carnival when she was a little girl though she has a different accent.