Here are links to some recent talks and lectures:

Sather lectures, UC Berkeley 2017:
‘Seeing and Saying, Plato on virtue and knowledge’

1.  No word in vain: Reading Plato’s dialogues (again) here
2. The wandering ‘we’  here
3. Parsing vision here
4. Rereading Glaucon’s challenge: Plato’s distinctions in goodness here
5. Plato’s lexicon of logos here
6. Giving and taking an account: Plato on the language of conversation here

'Talking together, talking to ourselves: Socrates and the crisis of the universities'
Here is the text of my valedictory lecture delivered on 19th May 2014. 
Here is the youtube recording of the lecture as it was delivered: start at 9.50!