They have announced the dates for U.K. Nationals, including Armada, this September. The event runs over three days, and may be like the Euro championship - 2 days of Swiss, then a day of top 4 knockout. Looking forward to it!
http://www.esdeviumgames.com/news-item/announcing-ffg-uk-regionals-and-nationals/
As a reminder, here are the details for the Euro championship in June. Already 44 tickets sold so far!
https://www.fantasyflightgames.com/en/news/2016/11/21/the-2017-european-championships/
http://www.ukgamesexpo.co.uk/bookevents.php?subcat=ffg
Got my ticket booked. Sound off any forumites who are going!