The Yorkshire rider leads Niewiadoma by just one second going into Saturday’s finale in Carmarthenshire, with Boels Dolmans rider Amy Pieters a further 31 seconds in arrears. In addition to retaining her lead in the HSBC UK | British Cycling Best British Rider jersey, Deignan also moves to the top of the standings in the Breast Cancer Care points jersey.
Niewiadoma’s efforts on the climbs see her take the lead in the SKODA Queen of the Mountains jersey, while 2018 overall champion Coryn Rivera (Team Sunweb) retains the Eisberg sprints jersey.
Overnight race leader Liane Lippert (Team Sunweb) finished 22nd, losing two minutes and 19 seconds to fall away in the overall classification and lose her OVO Energy green jersey.
The German had been in the main pack featuring all of the general classification contenders approaching the final SKODA Queen of the Mountains climb of Epynt, before the race was sparked into life by the aggressive riding of Trek-Segafredo duo Deignan and Longo Borghini.
That saw the final two riders from the day’s breakaway, Erica Magnaldi (WNT – Rotor Pro Cycling) and Amalie Dideriksen (Boels Dolmans), reeled in and the chasing pack splintered, with just 20 riders reaching the Royal Welsh Showground within two minutes of Deignan.
First over the summit of the Epynt climb moved Niewiadoma into the SKODA Queen of the Mountains climb, with a one-point advantage over previous incumbent Christine Majerus (Boels Dolmans).