So, end of day 1, just having a 2 scoop original with decaffeinated coffee after an hour of belly dancing, I felt hungry when I got home but not hangry which is my usual default mood in the evening before dinner 
So total consumption today, Huel is generally a blend of original vanilla and UU
-2 scoops Huel with 2 small bananas (needed eating, normally just have 1) with a tsp of cocoa powder
-3 scoops Huel with mixed frozen berries. I kept topping the liquid up in this one to eek it out over the whole afternoon
-2 scoops with decaf coffee
+3 americano coffees with milk during the day.
Had a day of figures and spreadsheets and had no concentration problems. Roll on day 2!