No, he's made his account private in the last hour or two. There are plenty of screenshots floating about showing his original three tweets and at least one follow up, however. What a prat, to go on the record in this way. Surely this warrants some sort of disciplinary action?
Freedom of thought and freedom of expression are essential in a university, but as with ever other human right there have to be limits so you don't impinge on others' rights. In this instance, his tweets are pouring fuel on the fire started by these students (at least I hope they're students, if other academics have actually been involved in the poster campaign the university is really down the rabbithole). In her place, I would now be genuinely worried for my personal safety. She is a woman and she is a lesbian - two protected characteristics under the Equality Act. Additionally, the University is her employer and has a duty of care towards her. They need to act without further delay to make it abundantly clear that she is not going to be fired and the students concerned will face disciplinary action for bullying and intimidation. I hope they've also given her extra security.
Professor Selina Todd and Professor Rosa Freedman have both had to have extra security following incidents of a similar nature, at Oxford and Reading respectively. It's abhorrent behaviour.
I'd like to see a strong statement from the government on this too. I can't see this losing them votes, quite the contrary.