Hi Marcus, thanks for sharing as well,
I use V2.2 unsweetened/unflavoured and also experience the headache within 30 minutes afterwards, I take one 'meal' a day (3 scoops, 700ml water). It's not something that I experience with (regular) meals, so I'm looking at Huel being the cause.
What is relevant (and very interesting) is that my tinnitus starts getting remarkably louder directly after consuming Huel. This probably indicates an intolerance to something inside Huel? I suspect a relation to the headaches.
Just wanted to share, I'll be thinking about how to proceed.