On 13th June just gone OpenTech 2015 happened. It was an event sponsored by the Open Data Institute.
The event hosted talks of various kinds, all relating to Open Tech and open data particularly. Although I did not go, or even realise it was happening, looking at their web site it looks like they had a good selection of talks. Some of which have been made available in either audio or video form.
So if you want to learn about some great open data projects this is the place to go. Unfortunately the talk about The Great British Public Toilet Map is not online, but I’m sure there will be other things to take your interest.