DIY Doctor UK DIY Forums

What you have is a normal ceiling rose.
It's cables will never fit your new light, that is why you are having problems.
You have 2 options

1) Take the current lamp holder off and change the flex to a 3 core flex and connect this to your light. (leaving the ceiling rose as it is)

2) Use wago connectors and connect them as shown on the drawing and push them up into the roof space..........and then change the flex to a twin and earth cable and connect this to your light.

I was replying to the fact that you said you were changing to a ceiling rose to a LED bar light, which you are clearly now not doing.

You should connect your new light as shown in the drawing you posted.

Your new light will only have 3 terminals, you still need to keep the cables as they are / in the drawing, so you will still need wago connectors / choc bloc

Using the drawing as a guide you connect your new light to 2, 8 and 9 respectively

The Ashley J501 16 Amp Downlighter Junction Box is likely the easy method, it allows you to replace the ceiling rose with a junction box with cable grips.