BCMH has worked with Helion on a number of joint events, most recently and notably the presentation of a Festschrift to the late Professor Christopher Duffy British Commission for Military History » Festschrift Presentation to Prof Christopher Duffy, 5 July 2022 (bcmh.org.uk).
A number of members write for Helion and many more read their works.
Helion has presented Conferences on a wide range of subjects in recent years but now seem to be stepping them up. They will be of interest to many members but early booking is advised as they are very popular.
Upcoming Military History Conferences | Helion & Company
Apart from the three day Conferences listed here, there is also a Great War Evening on 7th November at the Oriental Club in London.