He has two postings about the event. The first is available to all viewers.
The second posting is only available to his newsletter subscribers and, in my opinion, he hits the nail on the head with that one in many ways. Here's the first paragraph, you'll have to subscribe to read the rest:
I'd like to compare this weekend's London event with other genealogy conferences and events in the United States. First of all, the show in London was a fair, not a conference. There is a huge difference. Genealogy conferences as held in the U.S. and in many other countries tend to be aimed at the intermediate to advanced genealogists. To be sure, many conferences also have topics for beginners but if you go down the list of presentations, define each as introductory, intermediate or advanced and then tally the results, you will find that most conferences are heavy in the intermediate to advanced categories. ...
Among his photos:
Here's a picture of the Jewish Genealogical Society of Great Britain booth.
House History seems very popular.
Check this out for one way to find your relatives in the crowd!