Having lost her British champion’s jersey to Laura Trott in 2014, Armitstead was determined to prove herself as the top female rider in the country on a challenging course.
Armitstead attacked on the first ascent of the cobbled Michaelgate climb, with Laura Trott unable to match the Otley rider’s pace.
The Boels-Dolmans rider then soloed to the line, beating Trott, Alice Barnes and Molly Weaver by 1-52.
Armitstead’s win came under two weeks after she crashed after winning stage one of the Aviva Women’s Tour and had to abandon the race with her injuries.
In total, the 26-year-old topped the podium nine times in 2015, including three rounds of the UCI World Cup. Her National Championships win was just her second day of racing in the UK this year, having abandoned the Women’s Tour after one day.