MP Tulip Siddiq's husband will push her through the House of Commons in a wheelchair on Tuesday.
"The sovereignty of Gibraltar is unchanged and is not going to change," said Britain's foreign minister Boris Johnson.
EU leadership is determined to present a united front as Theresa May seeks deals for Britain.
"After more than 40 years of being united, we owe it to each other to do everything we can to make this divorce as smooth as possible," Tusk said.
The former prime minister resigned after failing to secure a Remain vote.
The European parliament has the power to veto a Brexit deal and will play a key role in talks.
A free trade deal like Canada has with the EU would not provide the same market access British firms currently enjoy.
EU member states are not a unified club and divisions are likely to emerge.
The letter gives us some clues about May's negotiating priorities.
The two sides will need to meet three key objectives by March 2019.
A board member of Germany's federal bank has warned Britain of the potential consequences of its exit from the European Union.
PM Theresa May still needs laws passed to allow her to formally notify the EU of the UK's intention to leave.
At present most EU citizens who travel to Britain are free to live and work there as they wish.
Rogers says negotiating experience is in "short supply" amid "ill-founded arguments and muddled thinking."
If the prime minister wins her appeal, she can invoke Article 50. Lose and Parliament could block Brexit.
Abandoning the legal battle would avoid the risk of Scotland and Northern Ireland being afforded greater leeway in the decision to leave the EU.
Lead claimant in the ruling saying Parliament must consider Brexit says devolved governments also will fight according to their 'own particular interests.'
Outcry "shows either a total misunderstanding of the UK constitution, which such critics periodically extol—or a deliberate desire to destroy it," former attorney general says.