Organisations:
Dawn Duellist Society - Foremost HEMA group in Scotland based in Edinburgh
Aberdeen Swordsmanship Group - Fiore’s Longsword (Italian) but with an Aberdonian accent.

Forums:
Martial Arts Planet - WMA forum used by GCoD for a good argument

HEMA compatible Sword Suppliers:
ArmourClass - Premier supplier to the Glasgow Company of Duellists

Research materials:
Schielhau.org - Foremost repository for German Swordsmanship fechtbücher (Treatises)