If the Government lose the appeal to the Supreme Court, then Theresa May should call an immediate General Election and commit the Conservatives to implement the will of the British people if re-elected.
They will get a thumping majority, especially given that Labour remain unelectable.
UKIP candidates should not stand against any sitting MPs who commit to voting for Brexit in parliament. They should stand in seats held by any Labour, Lib Dems or Tory remainers like Ken Clarke who won't sign up to standing by Brexit.