Full details are here:
https://www.yamahamusiclondon.com/article.php?article_id=192
It is being hosted by Ross Bailey (Rossyamaha on the Fretboard forum) who is a very handy session player and the font of all helix knowledge.
No doubt it will be concentrating on guitar use, but the Helix is an amazing bass unit too, and the routing options are beyond anything else I've ever heard of.
Apparently it will be streamed on the Yamaha facebook page too.
I'm most annoyed I can't get out of work. I love my Helix - it has replaced multiple preamps and pedals for me and I've only scratched the surface.