Yes as above, most of these light fittings are not designed for installation on UK (or any) wiring, and many of the manufacturers are *******.
UK wiring is designed so that 2 faults need to be present before there is a danger of electric shock.
e.g.
Insulation on live wire fails and conductor touches earthed metal light fitting. Fuse blows - One fault, safe
Insulation on live wire fails inside enclosure shown above and conductor touches insulating plastic enclosure fuse doesn't blow, but metal fitting not live - One fault, safe.
Earth wire to Class I metal light fitting comes out of earth terminal due to lose connection. Insulation on live wires in good condition. - One fault, not ideal, but the user is still safe (at least for now)
Earth wire to Class I metal light fitting comes out of earth terminal due to lose connection. Insulation on live wire fails and conductor touches now unearthed metal - 2 faults, unsafe and a danger of electric shock is now present.
Now we come to your fitting and why it is important that all the single insulated wires are enclosed in a suitable insulating enclosure.
Insulation on live wire fails, it is hanging out of above shown enclosure due to sloppy installation. Insulation on live wire fails and the conductor touches the unearthed metal of the classII light fitting. - One fault, unsafe and a danger of electric shock is now present with just a single fault.
If it was wired properly, there would have to be damage to the cables outer sheathing (fault one) and damage to the wires insulation inside the sheathing (fault two) for there to be an unsafe condition that creates a shock hazard.
Post a photo of the connector you have on your light fitting, and let us know how many cables you have poking out of the ceiling at each fitting.
