Winnifrith had certified second-fastest for the ultimate behind Impartial Paralympic Athlete and defending champion Mariia Pavlova.
However Pavlova began the ultimate strongly and maintained her dominance, beating her personal world file by 0.77 seconds with a time of 1:26.09 because the Briton set a brand new private better of 1:29.69 forward of Canada’s Tess Routliffe (1:31.38).
“I am actually proud of that swim. A lot as I needed the gold, it is nonetheless a silver medal and a lifetime finest,” stated the Kent swimmer, who, like her idol Ellie Simmonds, has now gained a Paralympic medal aged 13.
“I knew I needed to battle for a medal. I attempted to catch the opposite woman as a lot as potential however at the moment it wasn’t sufficient.
“Ellie has influenced me a lot and I’ve now met her a couple of occasions and she or he has actually helped me.”
Winnifrith is Britain’s youngest Paralympic swimming medallist since Scotland’s Abby Kane claimed S13 backstroke silver at Rio 2016, six weeks after her thirteenth birthday.
Joanne Spherical, later Joanne Rout, stays Britain’s youngest Paralympic champion after she gained two relay golds on the 1988 Seoul Video games aged 12.