Brexit challenge's lead claimant hails UK Supreme Court ruling

Gina Miller, the lead claimant in the Brexit challenge, welcomed the UK Supreme Court's ruling, saying "no prime minister, no government can expect to be unanswerable or unchallenged.

Gina Miller (pictured), the lead claimant in the Brexit challenge, welcomed the UK Supreme Court's ruling, saying "no prime minister, no government can expect to be unanswerable or unchallenged.

"Parliament alone is sovereign."