"An imitation firearm is defined under the Act as an article of any material or colour that is a copy or reproduction of a firearm or has the appearance of a firearm and could reasonably be mistaken for a firearm.
It is the size and features of the item which make it an imitation, not the colour. If it is clearly a toy it is not an imitation firearm. If it could reasonably be taken to be a firearm then it is an imitation firearm." - Firearms Services
This is rather vague. What looks like a toy to one person may look realistic to someone else. Once again I'm going to slip into 3D printing (nonfunctional) game replicas, namely DOOM Eternal's Super Shotgun since it illustrates what I'm talking about rather well.
https://www.thingiverse.com/thing:4236707This looks like a toy to me. To me this is almost emitting beams of "3D printed toy." But to other people it may not be so obvious.
This whole idea of what something looks like having a major part in it's classification is therefore ridiculous, surely? Whether something looks like a toy is purely subjective, right?