You have a slight problem if ordering from Poland, it's advertised at 140 meters per second in .22, which is 459fps. There's no mention of pellet weight, but assuming for example AA Fields at 16grain, it produces 7.48fpe. Even with 14.3grain pellets, produces 6.69fpe at that speed.
11.9grain hobbies come in at 5.56fpe, but that's not to believe this is what the velocity is quoted on.
It could be that we are getting a de-tuned version for the UK, but then again, i could be wrong. All depends on what pellet weight those manufacturer specs were set on