Well, May said she wanted to get in the history books when she first became PM, and she's certainly achieved that - first government ever to be held in contempt of parliament, and now her government's been on the receiving end of the worst defeat in a parliamentary vote in history, after losing the vote on her withdrawal agreement by a margin of about 230 votes.
For reference, the previous worst defeat was suffered in 1924. By a Labour government who weren't even the biggest party in parliament at the time.