You have to laugh. The amazing gall of a group of criminals to actually attempt to fool anyone into thinking that very large denomination notes were in circulation. Even I know that anything above a £20 is never accepted anywhere, and even the £20 is not accepted in a lot of places. For a £1000 note, it is always worthwhile to check with someone official so this could never have gotten off the ground.
Why didn’t they just send emails from Nigeria or steal metal roadsigns/lead from roofs like everyone else is.