I went to the web page beforehand and saw that it gave the time as "20:30 GMT", which at this time of year would be 21:30 local time in both Ireland and Britain. So I went there about 21:20 local time tonight, only to find the talk already going on. I think it must have started at 20:30 local time.

I am very disappointed to have missed a large part of it, as presumably have others who planned to watch the webcast. I hope someone recorded it and can make it available in some way.

Richard