Don't think they'll work well with a brush, they are quite thick. Doesn't matter if AB or hairy stick, they need thinning.
My brush paints are Vallejo and they also have to be thinned. I’ll give the Humbrol a try as it will be a lot more convenient if I can just pop down to Hobbycraft to get a paint.
Don't know why I didn't think of Vallejo. The Humbrol droplet bottles are about the same consistency as the Vallejo Model Color 70.xxx range. The Humbrols thin easily with glas cleaner and spray well once thinned.