One of the biggest reactions to May's speech came as she mentioned the un-Brexit.
Theresa May says her Brexit deal is the best possible arrangement that fulfils the ambitions expressed by her voters in a referendum.
The alternatives, she insists, do not bear thinking about.
But when she spelled out the risk that the UK might fail to leave the European Union, she was greeted with a chorus of cheers.
May responded with a bemused expression.