There is a (small) entry for Warrior motorcycles, no illustration in
"The Illustrated Encyclopedia of Motorcycles" by Erwin Tragatsch.
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Warrior England 1921-23
Concentrated on one model with the 247cc Villiers engine.
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Which gives us a rather large clue.
Its a smallish two stroke powered utility/commuter type bike.
As was very popular in the immediate post WW1 era.
Villiers of Wolverhampton supplied (just) the engine, the rest was sourced
from numerous other suppliers and assembled into a complete bike.
Edit. I think this is the engine in question, a 247cc Villiers would be a larger version.
Whether it went back as far as 1921 maybe our resident Villiers authority can comment.
Finding a suitable pic in a bike of that exact era is not so easy, I'll work on it.