Kammala jumla mai zuwa: A lokacin da Margaret, ɗanta da surukarta (Anne) suka shirya su bi Warwick zuwa Ingila, teburin ya sake juyawa a cikin goyon bayan Yorkists, kuma Earl ya ci nasara kuma ya kashe shi da Sarki Edward IV a cikin
Yaƙin Barnet a ranar 14 ga Afrilu 1471. An tilasta Margaret ya jagoranci rundunarsa a yakin Tewkesbury a ranar 4 ga Mayu, 1471, inda sojojin Lancastrian suka ci nasara kuma an kashe ɗanta mai shekaru goma sha bakwai Edward na Westminster. Ba a taɓa bayyana yanayin mutuwar Edward ba; ba a sani ba ko an kashe shi a cikin ainihin fada ko kuma an kashe shi bayan yakin da Duke na Clarence ya yi. A cikin shekaru goma da suka gabata, Margaret ta sami suna don zalunci da rashin tausayi, amma bayan da aka ci ta a Tewkesbury da mutuwar ɗanta kaɗai, ta yi baƙin ciki ƙwarai. Bayan da William Stanley ya kama ta a ƙarshen yaƙin, Margaret ya ɗaure ta da umarnin Sarki Edward. Da farko an tura ta zuwa Wallingford Castle sannan kuma aka tura ta zuwa Hasumiyar London mafi tsaro. An kuma daure Henry VI a cikin Hasumiyar bayan Tewkesbury kuma ya mutu a can a daren 21 ga Mayu; ba a san dalilin mutuwarsa ba, kodayake ana zargin kisan sarki. A shekara ta 1472 an sanya ta a hannun tsohuwar uwargidanta Alice Chaucer, Duchess of Suffolk, inda ta kasance har sai da Louis XI ya fansa ta a shekara ta 1475.