Danny, I find the seminars a bit of a challenge myself, given that they usually involve travelling to/from Hendon and concentrating all day on fast flowing presentations. Hence the appeal of the Journals that encompass them all (including the bits that there wasn't time for on the day).
The latest Journal is #64, and the next Seminar is on 18th October 2016 about "Cold War Air Systems Procurement". Unfortunately for me it is being held at Filton so instead I'll read all about it in the next Journal.