Heres a video of one running. It seems to be gobbling fuel at the rate of knots.
If you're interested in jet engines and how Rolls Royce produce them you may find this worth watching. Theirs are somewhat larger.
I don't know if people outside the UK can see this. Its an unashamed plug for RR. I understand there are other - lesser - companies in the world that make something along the same lines. GEE or G I think they call themselves!