Some senior Conservatives are urging UK PM to withdraw her Brexit appeal
BBC reporting.
Sir Oliver Letwin, former head of the government's Brexit preparations, and two former law officers said the case should not go to the Supreme Court.
Instead, they want ministers to bring a bill to Parliament to start the process of Brexit as soon as possible.
Yesterday the Supreme Court confirmed that Wales and Scotland's senior law officers will be allowed to take part in the appeal.
A government spokesman said:
"The country voted to leave the European Union in a referendum approved by an Act of Parliament and the government is determined to respect that result.
"We will robustly defend our position in the forthcoming appeal. As the prime minister has made clear our work is on track and we remain committed to triggering Article 50 by the end of March next year."
The High Court ruled in early November that Parliament must vote on whether Article 50 could be invoked.A final judgement from the Supreme Court is not expected until January.
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