So I am hearing that May wants another vote on her deal tomorrow.
When she held her last vote recently, 391 voted against and only 242 voted for.
Yesterday, indicative votes were held. Here are the results.
So, about 268 support a referendum. So we can assume that at least 268 will vote against May's deal if another vote were held.
However, most importantly, 160 voted in favor of no-deal, and there is no overlap between this group and those that want a new referendum (one group is many Labor-party, the other group is mainly Conservatives). These must be those Conservatives who dislike May's deal so much that they'd rather embrace a no-deal. So they will vote against her too.
160 + 268 = 428 votes against her deal. So the indicative votes suggest that she has pretty much already lost. Even if 1 hundred of those who prefer no-deal to May's deal changed their mind, May still wouldn't win.
So why does she want another vote when it is clear it cannot win?